![Page 1: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/1.jpg)
NEETREVISIONSERIES
PLANTKINGDOM
ReviseMostImportantQuestionstoCrackNEET2020
DownloadDoubtnutNow
Q-1-13466300
Artificial systesm of classification were based upon
(A)vegetativecharacters
(B)androeciumstructue
(C)habitandhabitat
(D)allofthese.
CORRECTANSWER:D
SOLUTION:
Artificalsystemsofclassificationwerebasedupon
morphologicalcharacters(suchashabit,habitat,colour,
![Page 2: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/2.jpg)
numberandshapeofleaves,etc)forgroupinigof
organisms.Theyweremainlybasedonvegetative
charactersorontheandroeciumstructure.these
systemsseparatedthecloselyrelatedspeciessicnethey
werebasedonlyonafewcharacteristics.
WatchVideoSolutionOnDoubtnutApp
Q-2-13466349
Photosynthetic pigments of Rhodophyceae (red algae) are
(A)chlandb
(B)chlaandc,fucoxanthin
(C)chlaandd
(D)chla,chldandphycoerythrin.
CORRECTANSWER:D
![Page 3: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/3.jpg)
SOLUTION:
ThemumbersofRhodophyceaearecommonlycalled
redalgaebecauseofthepredominanceofthered
pigmentr-phycoerythininthgeirbody.Apartfromthis
othermajorpigmentsfoundinthemarechlorophylla
andchlorophylld.
WatchVideoSolutionOnDoubtnutApp
Q-3-13466380
The sporophyte is attached to the gametophyte in
(A)algae
(B)fungi
(C)bryophytes
(D)pteridophytes.
![Page 4: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/4.jpg)
CORRECTANSWER:C
WatchVideoSolutionOnDoubtnutApp
Q-4-15600580
More than one pyrenoid are present in
(A)Ulothrix
(B)Spirogyra
(C)Oedogonium
(D)Alltheabove
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-5-15600628
Algae attached to stone is called
![Page 5: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/5.jpg)
(A)Epilithic
(B)Epifolic
(C)Coenolithic
(D)Noneofthese
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
Q-6-15600643
Zygospore of Spirogyra produces
(A)2zoospores
(B)4zoospores
(C)2-4zoospores
(D)Noneoftheabove
![Page 6: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/6.jpg)
CORRECTANSWER:D
SOLUTION:
Zygosporeundergoesmeiosistoformanewfilament.
WatchVideoSolutionOnDoubtnutApp
Q-7-15600672
Indian species of Spirogyra in which Prof. lyengar discovered direct
lateral conjugation is
(A)Spirogyrasahnii
(B)Spirogyraindica
(C)Spirogyrajogensis
(D)Spirogyrakarnlae
CORRECTANSWER:C
![Page 7: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/7.jpg)
SOLUTION:
Lyenger(1958)reporteddirectlateralconjugationin
Spirogyrajogensis.
WatchVideoSolutionOnDoubtnutApp
Q-8-15600731
Calyptra develops from
(A)Venterwallofarchegonium
(B)Outgrowthofgametophyte
(C)Neckwallofarchegonium
(D)Paraphysisofthearchegonialbranch
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
![Page 8: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/8.jpg)
Q-9-15600660
Which one of the following is an example of chlorophyllous
thallophyte
(A)Volvariella
(B)Spirogyra
(C)Nephrolepis
(D)Gnetum
CORRECTANSWER:B
WatchVideoSolutionOnDoubtnutApp
Q-10-13466317
Match column I with column II and select the correct option from
the codes given below
![Page 9: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/9.jpg)
(A)A-(iii),B-(ii),C-(i)
(B)A-(ii),B-(i),C-(iii)
(C)A-(i),B-(ii),C-(iii)
(D)A-(ii),B-(iii),C-(ii)
CORRECTANSWER:A
SOLUTION:
Cryptogamaereferstopaltnswithoutseedsand
phanerogamaereferstoplantswithseeds.Algaeand
bryophytesarenon-vascularcrypogams.Pteridophytes
arevascularcryptogams.Gymnospermsand
angiospermsarephanerogams.
ColumnI ColumnIIA
. Non-vascularcryptogams(i)
. Gymnosperms,angiospermsB. Vascularcryptogams (ii). pteridophytes
C. Phanerogams (iii). Algae,Bryophytes
![Page 10: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/10.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-11-13466374
The female sex orgain in Riccia and funaria is
(A)antheridium
(B)paraphysis
(C)archegonium
(D)oogonium
CORRECTANSWER:C
SOLUTION:
thesexorganinbryophytes(Riccia,Funaria),
aremulticellularandjacketed.Thejacketofsterilecell
aroundthespermandeggisanadaptationtoalifeon
land.Themalereproductiveorgansareantheridiaand
![Page 11: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/11.jpg)
femalereproductiveorgansarearchegonia.
WatchVideoSolutionOnDoubtnutApp
Q-12-15600604
Red rust of tea is caused by
(A)Cephaleuros
(B)Sunchytrium
(C)Mucor
(D)Fusartium
CORRECTANSWER:A
SOLUTION:
ParasticalgaelikeCephaleuros(greenalga)causesred
rustoftealeavesandC.coffeaattackscoffeeleaves.It
![Page 12: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/12.jpg)
isredduetohaematochrome.
WatchVideoSolutionOnDoubtnutApp
Q-13-15600734
Funaria is attached to substratum by
(A)Roots
(B)Rhizoids
(C)Haustoria
(D)Stem
CORRECTANSWER:B
SOLUTION:
Funariaisattachedtosubstratumbyrhizoidsare
branched,multicellular,arisefrombaseofaxisandhave
![Page 13: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/13.jpg)
obliqueseptatoincrease.
WatchVideoSolutionOnDoubtnutApp
Q-14-15600676
Which one of the following is wrongly mathced
(A)Spirogyra-Motilegametes
(B)Sargassum-ChlorophyllC
(C)Basidiomycetes-Puffballs
(D)Nostoc-Waterblooms
CORRECTANSWER:A
SOLUTION:
LifecycleinSpirogyraishaplonticasdominantphasein
lifecycleishaploid(n)anddiploidphaseisrepresented
![Page 14: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/14.jpg)
byonlyzygosporeanditundergoesmeiosis.
WatchVideoSolutionOnDoubtnutApp
Q-15-15600744
The dehiscece of moss capsule takes place by rupture of
(A)Operculum
(B)Peristome
(C)Annulus
(D)Calyptra
CORRECTANSWER:C
SOLUTION:
Annulusassistsindehisenceofcapsule.
WatchVideoSolutionOnDoubtnutApp
![Page 15: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/15.jpg)
Q-16-15600644
On gemination each zygospore of Spirogyra gives rise to
(A)Fourplants
(B)Threeplants
(C)Twoplants
(D)Oneplant
CORRECTANSWER:D
SOLUTION:
Becausesinglezygosporeproducefoursporesbutthree
arediminishedandremainingonedevelopintoanew
plant.
WatchVideoSolutionOnDoubtnutApp
![Page 16: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/16.jpg)
Q-17-13466345
Lamionarin and mannitol, the reserve food of brown algae, are
(A)lipids
(B)complexcarbohydrates
(C)proteins
(D)lipoproteins.
CORRECTANSWER:B
SOLUTION:
Thefoodinthemembersofphaeophyceaeisstoredas
complexcarbohydratesintheformoflaminarinor
mannitol.
WatchVideoSolutionOnDoubtnutApp
![Page 17: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/17.jpg)
Q-18-13466376
A sterile jacket around gemetangia is found among
(A)bryophytes
(B)lichens
(C)algae
(D)fungi
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
Q-19-15600615
Sexual reproduction in algae results in the formation of
(A)Oospore
![Page 18: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/18.jpg)
(B)Zoospore
(C)Zygoteq
(D)Zygospore
CORRECTANSWER:D
SOLUTION:
Fusionofgametesresultsintheformationofzygote,
whichbysecretingathickwallactsasperennatingspore
(zygopore)andhelpsinperennation,dispersaland
multiplication.
WatchVideoSolutionOnDoubtnutApp
Q-20-15600638
Which one is wrongly matched
(A)Uniflagellategametes-Polysiphonia
![Page 19: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/19.jpg)
(B)Biflagellatezoospores-Brownalgae
(C)Gemmacupe-Marchantia
(D)Unicellularorganism-Chlorella
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
Q-21-13466395
Which of the following is not a moss?
(A)Polytrichum
(B)Sphagnum
(C)Funaria
(D)Riccia
CORRECTANSWER:D
![Page 20: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/20.jpg)
SOLUTION:
Ricciaisaliverwort(Hepaticae),whichgrows
predominantlyinwetterrestrialhabitatsandarefree
floatingorsubmergedaquatic.
WatchVideoSolutionOnDoubtnutApp
Q-22-15600623
The thallus of volvox is called
(A)Trichome
(B)Coenobium
(C)Coenocyte
(D)Parenchymatous
CORRECTANSWER:B
![Page 21: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/21.jpg)
SOLUTION:
Volvoxhollowballlikecolonywithafixednumberof
cellsiscalledcoenobium.
WatchVideoSolutionOnDoubtnutApp
Q-23-15600632
Syngamy can occur outside the body of the organism in
(A)Mosses
(B)Algae
(C)Ferms
(D)Fungi
CORRECTANSWER:B
WatchVideoSolutionOnDoubtnutApp
![Page 22: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/22.jpg)
Q-24-13466387
Gammae are asexual reproductive bodies of
(A)brownalgae
(B)mosses
(C)liverworts
(D)redalgae
CORRECTANSWER:C
WatchVideoSolutionOnDoubtnutApp
Q-25-13466329
Agar-agar is commerically obtained form
(A)greenalgae
![Page 23: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/23.jpg)
(B)blue-greenalgae
(C)brownalgae
(D)redalgae.
CORRECTANSWER:D
SOLUTION:
Agarisgel-likenon-nitrogeneousextractobtainedfrom
redalgae.Itisusedasamediumintheculturesof
bacteria,fungiandothermicroorganismsandalsoin
numerousindustrialprocesses,e.g.,food,bakery,
cosmetics,leather,textileindustries,inconfectionery,
etc.
WatchVideoSolutionOnDoubtnutApp
Q-26-13466358
![Page 24: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/24.jpg)
Select the correct match of of algal class and its characteristic
flagellation.
(A)Chlorophyceae-2-8equal,apical
(B)Phaeophyceae-2,unequal,lateral
(C)Rhodophyceae-Absent
(D)allofthese.
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-27-15600588
Choose the correct order of colours with respect to pigments,
chlorophyll,phycoerythrin and fucoxanthin
(A)Gree,redandbrown
![Page 25: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/25.jpg)
(B)Brown,greenandred
(C)Red,greenandbrown
(D)Green,brownandred
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
Q-28-15600747
Acrocarpous, solitary sporagia are found in
(A)Opuntia
(B)Cycos
(C)Pinus
(D)Funaria
CORRECTANSWER:D
![Page 26: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/26.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-29-15600725
During development of embryo in archeogonium of Bryophyta its
posterior part form protective embryo cover which is called
(A)Calyptra
(B)Paraphysis
(C)Apophysis
(D)Hypophysis
CORRECTANSWER:A
SOLUTION:
Thearchegonialventerformsaprotectivecovering
aroundtheembryocalledcalyptra.
![Page 27: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/27.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-30-15600668
Meiosis in Ulothrix takes place during
(A)Zoosporeformation
(B)Gameteformation
(C)Zygotgermination
(D)Zoosporegermination
CORRECTANSWER:C
SOLUTION:
Favourableconditionseachzygotegeminatesto
produce4-16meiospores(zoosporesoraplanopores).
Thefirstdivisionofdiploidzygoticnucleusismeiosis.
Themeio-zoosporesormeioaplanoporesgeminateto
![Page 28: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/28.jpg)
producenewfilaments.
WatchVideoSolutionOnDoubtnutApp
Q-31-15600898
Resin duct of a gymnospermous stem is and example of
(A)Bigvacuole
(B)Lysigenouscavity
(C)Intercellularspace
(D)Schizogenouscavity
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-32-15600738
Life cycle of Funaria is not completed without water. Choose the
![Page 29: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/29.jpg)
correct statement.
(A)AsFunariaisabryophyteplant
(B)Asbrancheswillnotdevelop
(C)Asfertilizationtakesplaceinpresenceofwateronly
(D)Asplantisdeflicateandwillbecomedryanddie
withoutwater
CORRECTANSWER:C
SOLUTION:
LifecycleofFunariaisnotcompletedwithoutwater
becauseantherozoidsswimacrossthefilmofwaterand
antherozoidfusewiththesingleeggtoproducezygote
(2n).
WatchVideoSolutionOnDoubtnutApp
![Page 30: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/30.jpg)
Q-33-15600903
A typical gymnospermous plant has 8 chromosomes in leaf cells.
What will be number of chromosomes in the cells of its
gametophyte
(A)16
(B)8
(C)4
(D)24
CORRECTANSWER:C
WatchVideoSolutionOnDoubtnutApp
Q-34-15600584
Which of the following is not correctly metached
![Page 31: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/31.jpg)
(A)Chlamydomonas-Unicellularflagellated
(B)Laminaria-Flattenedleadlikethallus
(C)Chlorella-Unicellularnon-flagellated
(D)Volvox-Colonialformnon-flagellated
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-35-13466342
Which of the following pigments are found in brown algae?
(A)Chla,Chlc
(B)Chla,Chld
(C)Chla,Chlcadfucoxanthin
(D)Chla,phycoerythrin
![Page 32: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/32.jpg)
CORRECTANSWER:C
SOLUTION:
Themembersofphaeophyceaeorbrownalgaepossess
chlorophylla,chlorophyllc,carotenoidsandxanthophyll.
Theyvaryincolourdependingupontheamountofthe
xanthophyllpigment,fucoxanthinpresentinthem.
WatchVideoSolutionOnDoubtnutApp
Q-36-13466368
Read the given statements and select the correct option
Statement-1: Bryophytes are amphibians of plant kingdom.
Statemnet-2: They live in soil but depend on water for sexual
reproduction.
(A)Bothstatements1and2arecorrect
![Page 33: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/33.jpg)
(B)Statement1iscorrectbutstatement2isincorrect
(C)Statement1isincorrectbutstatement2iscorrect.
(D)Bothstatement1and2arecorrect.
CORRECTANSWER:A
SOLUTION:
Bryophytesareknownas'amphibiansofplantkingdon'
becausetheyareadaptedtolandaswellaswater
habitats.Intheirvegetativestructure,bryophyteshave
becomeadaptedtoland.Buttheydependonwaterfor
sexualreproductionbecausetheswimminghabitis
retainedbytheirsperms.
WatchVideoSolutionOnDoubtnutApp
Q-37-15600639
![Page 34: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/34.jpg)
Two adjacent filaments fo Spirogyra offnis having 10 cells each are
particlipating in reproduction. How many new Spirogyra plants are
produced during sexual reproduction.
(A)5
(B)10
(C)20
(D)40
CORRECTANSWER:B
WatchVideoSolutionOnDoubtnutApp
Q-38-15600667
Spirogyra differs from Mucor in having
(A)Uninucleategametangia
![Page 35: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/35.jpg)
(B)Multicellulargametes
(C)Anisogamete
(D)Sexualreproduction
CORRECTANSWER:A
SOLUTION:
Mucorhavemultinucleategametangia.
WatchVideoSolutionOnDoubtnutApp
Q-39-15600895
What is the similarity between gymnosperms and angiosperms
(A)Pholemofbothhavecompaniancells
(B)Endospermisformedbeforefertilizationinboth
(C)Originofovuleandseedinsimilarinboth
![Page 36: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/36.jpg)
(D)Bothhaveleaves,stemandroots
CORRECTANSWER:D
SOLUTION:
Mainplantbodysporophyteofgymnospermand
angiospermaremadeupofroot,stemandleaves.
WatchVideoSolutionOnDoubtnutApp
Q-40-15600583
Consider the following statements with respect to algae
A. Fusion between one large, non-motile female gemale and a
smaller, motile male gemete is termed as oogamous
B. Fusion of two gemetes dissimilar in size is termed as isogamous
C. Fusion of two gemetes similar in size is called anisogamous
D. In chlorophyceae the major pigments are chlorophyll a and b,
and the food is stored as starch
![Page 37: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/37.jpg)
(E. In rhodophyceae the major pigments are chlorophyll a and d and
the food is stored as mannitol.
(A)AandEalonearecorrect
(B)CandEalonearecorrect
(C)AandBalonearecorrect
(D)AandDalonearecorrect.
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-41-15600645
Pond silk' is the common name of
(A)Ulothrix
(B)Spirogyra
![Page 38: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/38.jpg)
(C)Voucheria
(D)Odedogonium
CORRECTANSWER:B
SOLUTION:
Spirogyragivessilkyfeelingontouching.
WatchVideoSolutionOnDoubtnutApp
Q-42-15600743
In moss capsule, dispersal of spores takes place through
(A)Peristometeeth
(B)Annulus
(C)Calyptra
(D)Operculum
![Page 39: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/39.jpg)
CORRECTANSWER:A
SOLUTION:
Dispersalofsporestakeplaceduetohygroscopicnature
ofperistomialteeth.
WatchVideoSolutionOnDoubtnutApp
Q-43-15600664
Which of the following shows aplanetism.
(A)Ulothrix
(B)Spirogyra
(C)Saprolegnia
(D)Chlamydomonas
CORRECTANSWER:B
![Page 40: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/40.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-44-15600629
Monoeclous plant of Chara shows occurrence of
(A)Upperoogoniumandlowerantheridiumonthesame
plant
(B)Antheridiophoreandarchegoniophoreonthesame
plant
(C)Stamenandcarpelonthesameplant
(D)Upperantheridiumandloweroogoniumonthesame
plant
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
![Page 41: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/41.jpg)
Q-45-13466336
Green algae usually have a rigid cell wall made of an inner layer of
____and an outer layer of_____.
(A)cellulose,cellulose
(B)pectose,pectose
(C)pectose,cellulose
(D)cellulose,pectose
CORRECTANSWER:D
SOLUTION:
Cellwallofgreenalgaeisthin,transparentandfirmand
consistsofouterpecticandinnercellulosiclayers.Itis
smoothbutinmostofspeciesitgetsthickenedatthe
anteriorendtoformanapicalpopilla.
![Page 42: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/42.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-46-13466386
Asexual reproduction in liverworts takes place by
(A)fragmentationofthalliandgemmaeformation
(B)gemmaeformationanddiploidsporeformation
(C)sporesformationandisogamy
(D)fragmentationandzoosporeformation
CORRECTANSWER:A
SOLUTION:
Asexualreproductioninloverwortstakesplaceby
fragmentationofthalli,orbytheformationofspecialised
structurescalledgemmae
![Page 43: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/43.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-47-13466350
Phycoerythrin is present in
(A)Euglena
(B)Polysiphonia
(C)Chlamydomanas
(D)fucus.
CORRECTANSWER:B
SOLUTION:
PhycoerythrinispresentinRhodophyceaeorredalgae
e.g.,polysiphonia
WatchVideoSolutionOnDoubtnutApp
![Page 44: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/44.jpg)
Q-48-13466316
Which out of the following are included under tracheophyta, i.e.,
vascular plants?
(A)Pteridophytes
(B)Gymnosperms
(C)Angiosperms
(D)allofthese.
CORRECTANSWER:D
SOLUTION:
Tracheophytaarethoseplantswhichpossess
conductingorvasculartissues,xylemandphloem.
Xylemtransportswaterandmineralswhilephloem
conductsorganicfood.Tracheophytesinclude
![Page 45: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/45.jpg)
pteridophytes,gymnospermsandangiosperms.
WatchVideoSolutionOnDoubtnutApp
Q-49-13466373
The prominent phase in the life cycle of bryophytes is
(A)gametophyte
(B)sprophyte
(C)seta
(D)sporogonium.
CORRECTANSWER:A
SOLUTION:
Bryophytesshowstwomorphologicallydistinct
heteromosphicgenerations,i.e.,gametophyticand
![Page 46: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/46.jpg)
sporophyticgenerations.Gametophyticgenerationisthe
dominantphaseoflifecycleandingeneraltheterm
plantbodyisusedtorepresentthisphase.
WatchVideoSolutionOnDoubtnutApp
Q-50-15600594
Isomorphic altermation of generations is found in
(A)Oedogonium
(B)Chara
(C)Vaucheria
(D)Ectocarpus
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
![Page 47: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/47.jpg)
Q-51-15600594
Isomorphic altermation of generations is found in
(A)Oedogonium
(B)Chara
(C)Vaucheria
(D)Ectocarpus
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-52-15600636
Which one of the following statements is wrong.
(A)LarminariaandSurgassumareusedasfood
![Page 48: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/48.jpg)
(B)Algaeincreasethelevelofdissolvedoxygeninthe
immediateenviroment
(C)Alginisobtainedfromredalgae,andGracilaria
CORRECTANSWER:C
SOLUTION:
Alginisobtainedfrombrownalgaeandcarrageeninfrom
redalgae.
WatchVideoSolutionOnDoubtnutApp
Q-53-15600674
A spore of Spirogyra sp. after resting period is
(A)Haploid
(B)Diploid
![Page 49: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/49.jpg)
(C)Aplanospore
(D)Zygospore
CORRECTANSWER:A
SOLUTION:
AsporeofSpirogyrasp.Afterrestingperiod(zygospore)
ishaploidbecausemeiosisoccursinzygospore.
WatchVideoSolutionOnDoubtnutApp
Q-54-15600735
The archegonia of Funaria is distinguished from that of Pinus of the
structure of
(A)Longneck
(B)Severalneckcanalcells
![Page 50: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/50.jpg)
(C)Stalkedventer
(D)Alloftheabove
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-55-15600653
Sexual reproduction in Spirogyra can be described as
(A)Morphologicalanisogamyandphysiologicalisogamy
(B)Morphologicalaswellasphysiologicalisogamy
(C)Morphologicalaswellasphysiologicalanisogamy
(D)Morphologicalisogamyandphysiologicalanisogamy
CORRECTANSWER:D
SOLUTION:
![Page 51: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/51.jpg)
SexualreproductioninSpirogyracanbedescribedas
fusionoftwomorphologicallyidentical,but
physiologicallydissimilargaemetes.
WatchVideoSolutionOnDoubtnutApp
Q-56-13466348
What is the characteristic brancghing pattern of dictyota thallus?
(A)Monopodial
(B)Excurrent
(C)Dichotomous
(D)Deliquescent
CORRECTANSWER:C
SOLUTION:
![Page 52: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/52.jpg)
Dictyotaisaribbonshapeddichotomouslybranched
marinebrownalgathatgrowsinshallowwater.Itsfrond
isflatanddichotomouslybranched.
WatchVideoSolutionOnDoubtnutApp
Q-57-13466391
In funaria, the haploid structures is
(A)protonema
(B)capsule
(C)columella
(D)seta.
CORRECTANSWER:A
SOLUTION:
![Page 53: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/53.jpg)
Funariaexhibitsgametophytic(n)aswellassporophytic
(2n)generationisrepresentedbyashortlived
protonemawhichproducesspermatozoidsin
antheridiumofmaleshootandegginarchegoniumof
femaleshoot.
WatchVideoSolutionOnDoubtnutApp
Q-58-15600625
In oogamy. Fertilization involves
(A)Alargenon-motilefemalegameteandasmallnon-
motilemalegamete
(B)Alargemotilefemalegameteandasmallnon-motle
malegemete
(C)Asmallnon-motlefemalegaemeteandalarge
motilemalegamete.
![Page 54: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/54.jpg)
(D)Alargenon-motilefemalegameteandasmallmotile
malegamete
CORRECTANSWER:D
SOLUTION:
Oogamyismostadvancedtypeofreproductioninwhich
malegameteismotilesmallerandnonfoodstoring
calledantherozoidwhilefemalegameteisfoodstoring,
nonmotilelargercalledoogonium.
WatchVideoSolutionOnDoubtnutApp
Q-59-15600748
The sporophytic phase in Funaria is well developed and is
composed of
(A)Foot,setaandcapsule
![Page 55: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/55.jpg)
(B)Sporesac
(C)Capsuleonly
(D)Footandcapsule
CORRECTANSWER:A
SOLUTION:
InFunariafullydevelpedsporophyte(sporangium)is
madeofthreeregionsi.e.,Basalfoot,setaandcapsule.
WatchVideoSolutionOnDoubtnutApp
Q-60-15600581
True nucleus is absent in
(A)Mucor
(B)Vaucheria
![Page 56: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/56.jpg)
(C)Volvox
(D)anabaena
CORRECTANSWER:D
SOLUTION:
AllareeukaryotesexceptAnabaena.Thelateris
prokaryoteswheretruenucleusisabsent.
WatchVideoSolutionOnDoubtnutApp
Q-61-15600752
Apophysis in moss capsule is
(A)Upperpart
(B)Middlepart
(C)Lowerpart
![Page 57: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/57.jpg)
(D)Fertilepart
CORRECTANSWER:C
SOLUTION:
Apophysisisbasalsterileportionofcapsulein
continuationwithseta.IncapsuleofFunariastomata
presentonlyinapophysis.
WatchVideoSolutionOnDoubtnutApp
Q-62-15600635
Male gametes are flagellated in
(A)Anabaena
(B)Ectocarpus
(C)Spirogyra
![Page 58: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/58.jpg)
(D)Polysiphonia
CORRECTANSWER:B
SOLUTION:
WatchVideoSolutionOnDoubtnutApp
Q-63-13466396
Funaria requires water because
(A)fertilisationoccursinwateronly
(B)Funariaisahydrophyte
(C)plantsneedwaterforgametogenesis
(D)gametangiacanotdevelopwithoutwater.
Anabaena − NonflagellatedmakegameteSpirogyra − Aplanogamy
Polysiphonia − Nonmotilespermatia
Ectocarpus − Pearshapedmotilemalegametes
![Page 59: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/59.jpg)
CORRECTANSWER:A
SOLUTION:
FertilisationofFunariaoccursinwater.Theantherozoids
arereleasedintowaterwheretheyswimandreach
archegonium.Anantherozoidfuseswiththeeggto
producetozygote.Thus,anexternallayerofwateris
essentialfortheswimmingofmalegametestothe
archegonia.
WatchVideoSolutionOnDoubtnutApp
Q-64-13466321
Read the given statements about algae and select the correct option:
(i). Plant body is thalloid
(ii). They are largely aquatic.
(iii). Reproduction occurs by vegetative, asexual and secual
![Page 60: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/60.jpg)
methods.
(iv). Chlamydomonas, volvox and Ulothrix are the multicellular
algae.
(A)StatementIandIIaretrue
(B)Statementiiandiiiaretrue.
(C)statements(i),(ii)and(iii)areture.
(D)Allstatementsaretrue.
CORRECTANSWER:C
SOLUTION:
Algaeareusuallyaquatic,eithermarineorfreshwater.
Onlyafewalgaeoccurinmoistterrestrialhabitatslike
treetrunks,wetrocks,moistsoil,etc.palntbodyis
thallus(aformwithoutanydifferentiationintoroot,stem
adleaves.)sexual,asexualandvegetativemodesof
![Page 61: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/61.jpg)
reproductionareabundant.formandsizeofalgaerange
frommicroscopicunicellularformslikechlamydomonas,
tocolonialformslikevolvoxandtofilamentousformslike
ulothrixandspirogyra.
WatchVideoSolutionOnDoubtnutApp
Q-65-13466357
Which of the following is a correct match of algal class with its
characteristic reserve food?
(A)Chlorophyceae-starch
(B)Phaeophyceae-Mannitol,laminarin
(C)Rhodophyceae-Florideanstarch
(D)allofthese.
CORRECTANSWER:D
![Page 62: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/62.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-66-15600587
Comparable to angioperms to anglosperms, which of the following
algae exhibits diplonitic life cycle
(A)Spirogyra
(B)Ectocarpus
(C)Polysiphonia
(D)Fucus
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-67-15600749
In moss, medulla has
![Page 63: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/63.jpg)
(A)Endodermis
(B)Hardrome
(C)Hypdermis
(D)Piliferouslayer
CORRECTANSWER:B
SOLUTION:
Theaxishascentralconductingstrandofslightlythick
walledparenchymatouselongateddeadcellscalled
hadrom.
WatchVideoSolutionOnDoubtnutApp
Q-68-15600675
Zygotic meiosis takes place in
![Page 64: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/64.jpg)
(A)Selaginella
(B)Spirogyra
(C)Pinus
(D)Brossica
CORRECTANSWER:B
SOLUTION:
PlantbodyofSpirogyraishaploidbutaftergametic
fusion,diploidzygosporeisformed,thuszygoticmeiosis
takesplace.
WatchVideoSolutionOnDoubtnutApp
Q-69-13466402
In pteridophytes, main plant body is (i), which is (ii) into true roots,
stem and leaves fill the blanks in above statements and select the
![Page 65: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/65.jpg)
correct option
(A)
(B)
(C)
(D)
CORRECTANSWER:A
WatchVideoSolutionOnDoubtnutApp
Q-70-15600616
ColumnI ColumnIIsporophyte differentiated
ColumnI ColumnIIsporophyte notdifferentiated
ColumnI ColumnIIgametophyte differentiated
ColumnI ColumnIIgametophyte notdifferentiated
![Page 66: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/66.jpg)
Macrocystis is a
(A)Redalgae
(B)Fungi
(C)Bryophyta
(D)Brownalgae
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-71-15600658
Zoospores are absent in
(A)Vaucheria
(B)Spirogyra
(C)Cladophora
![Page 67: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/67.jpg)
(D)Chlamydomonas
CORRECTANSWER:B
WatchVideoSolutionOnDoubtnutApp
Q-72-15600640
Spirogyra increases its body length by the division of
(A)Theapicalcell
(B)Thebasallcell
(C)Everycellofthebody
(D)Accumlationoffoddinthisbody
CORRECTANSWER:C
SOLUTION:
Spirogyraincreasesitsbodylengthbecauseeverycell
![Page 68: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/68.jpg)
ofthefilamentiscapableofgrowthdivisionandself
maintainance(Everycellhasnucelus).
WatchVideoSolutionOnDoubtnutApp
Q-73-13466333
Major photosynthetic pigemtns in green algae are
(A)Chlandaandb
(B)Chla,candfucoxanthin
(C)Chla,dandphycoerythrin
(D)Chlaandc.
CORRECTANSWER:A
SOLUTION:
Majorphotosyntheticpigmentsingreenalgaeare
![Page 69: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/69.jpg)
chlorophyllaandb.
WatchVideoSolutionOnDoubtnutApp
Q-74-13466377
The embryonic development in bryophytes takes place in the
(A)protonema
(B)sporangium
(C)antheridium
(D)archegonium
CORRECTANSWER:D
SOLUTION:
Inbryophytesthezygotedevelopsintoamulticellular,
undifferentiatedstructurecalledembryo.Theembryo
![Page 70: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/70.jpg)
developswithinventerofarchegoniumbyfurther
segmentationanddifferentiationfinallydevelopsintoa
fullfledgedsporophytecallledsporogonium.
WatchVideoSolutionOnDoubtnutApp
Q-75-15600622
Sea weeds are important source of
(A)Chlorine
(B)Fluorine
(C)Iodine
(D)Bromine
CORRECTANSWER:C
SOLUTION:
![Page 71: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/71.jpg)
Alargeamountofiodineisextractedfromkelps(brown
seaweeds)likeLaminaria,Eckloniaetc.)
WatchVideoSolutionOnDoubtnutApp
Q-76-15600740
If a moss protonema is developed from few cells of the moss
capsule wall, then most probably it will be
(A)Haplid
(B)Diploid
(C)Triploid
(D)Polyploid
CORRECTANSWER:B
SOLUTION:
![Page 72: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/72.jpg)
Capsulewallisadiploidpartofsporphyte,ifprotonema
isdevelopsfromitscells,itmustbediploid.
WatchVideoSolutionOnDoubtnutApp
Q-77-15600662
A cell of Ulothrix has chloroplasts
(A)1
(B)2
(C)3
(D)4
CORRECTANSWER:A
SOLUTION:
EachcellocontainsasinglechloroplastinUlothrix.
![Page 73: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/73.jpg)
WatchVideoSolutionOnDoubtnutApp
Q-78-15600631
Which of the following is not correctly matched for the organism
and its cell wall degrading enzyme.
(A)Fungi-Chitinase
(B)Bacteria-Lysozyme
(C)Plantcells-Cellulase
(D)Algae-Methylase
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
Q-79-13466352
Selection the incorrect statement regarding reproduction in
![Page 74: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/74.jpg)
rhodophyceae.
(A)Asexualreproductionoccursbynon-motilespores.
(B)Sexualreproductionoccursbymotilegamets.
(C)Sexualreproductionisoogamous.
(D)Complexpost-fertilisationdevelopmetalevents
occurs.
CORRECTANSWER:B
SOLUTION:
SexualreproductioninRhodophyceaeisoogamous
sexualreproductiontakesplacebynon-motilegametes.
WatchVideoSolutionOnDoubtnutApp
Q-80-13466325
![Page 75: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/75.jpg)
Which type of sexual reproduction is found in volvox?
(A)isogamous
(B)anisogamous
(C)oogamous
(D)allofthese.
CORRECTANSWER:C
SOLUTION:
Volvoxshowsadvancedoogamywhichtakesplaceby
theformationofantheridiaandoogonia.Theymaybe
fomredonthesameplant(monoecious)orondifferent
plants(dioecious)thesex-organsareproducedfewerin
number.
WatchVideoSolutionOnDoubtnutApp
![Page 76: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/76.jpg)
Q-81-15600900
Which of the following is not the feature of gymnosperms
(A)Porous
(B)Ringporous
(C)Diffusedporous
(D)Non-porous
CORRECTANSWER:D
WatchVideoSolutionOnDoubtnutApp
![Page 77: Download Doubtnut Now · Bryophytes are known as 'amphibians of plant kingdon' because they are adapted to land as well as water habitats. In their vegetative structure, bryophytes](https://reader033.vdocuments.us/reader033/viewer/2022042409/5f25a3e69c90390177428085/html5/thumbnails/77.jpg)