botany02-model papers of kerala board of higher secondary education, xiith class

7/29/2019 Botany02-Model papers of Kerala Board of Higher Secondary Education, XIIth Class

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UNIT : III

Chapter - 8 : POPULATION, BIOTIC COMMUNITY SUCCESSION

C.O. - 26 : To understand the ecological succession and different patterns of succession.

Question Text

Observe the figures given below and answer the following questions.

a) Identify the ecological concept converged through the given figures. (1)

b) Name the group of organisms coming as pioneer community in this ecological process. (1)

c) Give any two characteristic features of climax community. (1)

[3 score; 5 minutes]XmsgsImSpnp Nn{Xw \nconv tNmZypcw FgpXpI.

a) sImSpnp Nn{Xnse CtmfPn Bibw XncndnbpI. (1)

b) CtmfPob{]{Inbbn ]b\ntbgvkv Bb PohnbpsS t]cv (1)

c) ssamIvkv IyqWnnbpsS cv khntijXI FgpXpI. (1)

[3 kvtIm; 5 an\nv]


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Scoring Key

Scoring Indicators Stage Total Time

Score Score (Minutes)

(a) Analysing the figures and identify.

- Seral stages of hydrarh 1(b) Recognises the pioneer community.

- Phytoplanktons. 1

(c) Recollects the characteristics features of climax community.

- Community structure

(large sized individual, many, specialised ecological riches)

- Community function

(complex food chain and food web)

High nutrient conservation.

Efficiency of energy use is high

(any two features - 12 12 ) 1 3 5

UNIT : III

Chapter - 9 : ECOSYSTEM, STRUCTRE AND FUNCTION

C.O. - 26 : To understand the structure and functions of ecosystem.

Question Text

In nature there is no independent food chain.

a) Do you agree with the given statement? Justify. (1)b) Decomposers have important role in nutrient cycling. Substantiate. (1)

[2 score; 4 minutes]

{]IrXnbn kzX{ambn BlmcirwJeI ImWsSpn.

a) \n Cu {]kvXmh\tbmSv tbmPnpptm? (1)

b) hnLmSIv \yq{Snb\v ssknwKn kp{][m\m\apv hnebncppI. (1)

[2 kvtIm; 4 an\nv]

Scoring Key



(a) Analyse the fact that

- The members of one food chain from the members of

another food chain also. 1

(b) Communicate the knowledge

- Complex dead remains of plants and animals are breaking

down into simpler ones by the activity of decomposers,

release mineral nutricients into the soil and maintains the

nutricient cycling property 1 2 4


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UNIT : III

Chapter - 7 : ORGANISMS AND THE ENVIRONMENT

C.O. - 22 : To understand the effect of various environmental factors of ecosystem, de-

gree of tolerance of various organisms and ecological adaplations.

Question Text

Normal plants cannot grow in marshy area but rhizophora grow well.

a) Mention the role of pneumatophore in rhizophora (1)

b) Point out any four adaptive features of this plant. (2)


NXpp\nen ssdtkmt^mdsNSnv hfcm IgnbpXpt]mse av km[mcW sNSnIvhfcm Ignbpn.

a) ssdtkmt^mdbn ImWsSp thcpIfpsS [aw Fv? (1)

b) ssdtkmt^mdbn ImWsSp GsXnepw \mev {]tXyI A\pIqe\ hniZampI. (2)

[3 kvtIm; 5 an\nv]

Scoring Key



(a) Establishes the cause effect relationship of pneumatophore in

rhizophora. It is a breathing root, comes out of the soil

- gaseous exchange through the pneumatophore at its tip. 1

(b) List the adaptive feature

- presence of salt glands

- vivipary

- stilt roots

- presence of sorbitol and proline

- succulent (any four - 12 12 ) 2 3 5

UNIT : IV

Chapter - 12: GENETIC IMPROVEMENT AND DISEASE CONTROL

C.O. - 22 : To understand the common diseases of plants and animals cause, symptoms,spreading and control measures.

Question Text

Observe the given table and rearrange correctly.

Sl. No. Name of the disease Host Causative agents

1. Late blights Tobacco Nematodes

2. Cancer Brinjal Virus

3. Mosaic Citrus Fungi

4. Root knot Pozato Bacteria



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]nI \nconv icnbmb hn[n {IaoIcnpI.

{Ia tcmKns t]cv BXn-tYb tcmK-Imcn\ kkyw

1. tev ssv sSm_mtm \nam-tmSvkv

2. Imk {_nPm sshdkv

3. samsskIv kn{Skv ^ssP

4. dq v t\m v s]mmtm _mIvSo-cnb

[3 kvtIm; 5 an\nv]

Scoring Key



Categorises the diseases, host and causative agents in

appropriate manner.1. Late blight - potato - fungi

2. Citrus cancer - citrus - bacteria

3. Mosaic disese - toboacco - virus

4. Root knot - brinjal - nematodes ( 12 4) 2 2 4

UNIT : IV

Chapter - 3 : PHOTOSYNTHESIS

C.O. - 6 : To understand the mechanism of photochemical and biosynthetic phases of

photosynthesis.

Question Text

Statement relating with the process of photosynthesis is given. By analysing the statement, identify the

type of energy productiox. Express your analysis through correct schematic representation.

$ Absroption of light energy by accessory pigments.

$ Transfer of light energy to chlorphyll a in pigment systems.

$ Activation of chlorphyll a.

$ Electron transport through series of electron acceptors.

$ Synthesis of ATP and reducing power NADPH.$ Photolysis of water and O

2evolution.


{]ImikwtjWhpambn _s {]kvXmh\I Xmsg sImSpnpv. {]kvXmh\IhniIe\w sNbvXv GXv Xcnep Du\namWamWv \SpsXv IspI. hniIe\w kv{IoamnIv Ub{KneqsS hyampI.

$ BIvkdn ]nKvsapI {]ImtimPw BKncWw sNpp.

$ {]ImtimPw tmtdm^n a bntev ssIamw sNsSpp.

$ tmtdm^n a Xm{X BIvSnthUv BIpp.

$ CeIvt{Sm kzoImfneqsS CeIvt{Sm ssIamw sNsSpp.


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$ ATP bpsS \namWhpw sdUyqknwKv ]hdmb NADPH s \namWhpw.

$ PeXm{XbpsS hnLS\hpw HmIvknPs \nKa\hpw.

[3 kvtIm; 5 an\nv]

Scoring Key



Analyse the given statements and arrived at the conclusion that

- Non cyclic photophosphrylation. 1

- Draw correct schematic representation of non-cyclic

photophosphorylation with two pigment systmes

(PS I and PS II) and electron transport through series of

electron acceptors, ATP synthesis, NADPH formation,

photolysis of water etc. 2 3 5

UNIT : II

Chapter - 5 : REPRODUCTION IN FLOWERING PLANTS

C.O. - 16 : To understand pollination, its types, agents of pollination, its development and

the characteristics features of angirsperms.

Question Text

Match the column A to column B.

Name of the plant Kinds of pollination

Maize Hydrophily

Vallisneria Entamophily

Jasminum Ornithophily

Bambax Anemophily


tImfw A bpw B bpw XmcXayw sNpI.

kky-ns t]cv ]cm-K-W-coXn

tNmfw sslt{Um-^nenhmen-kvt\-dnb Fs-tam-^nen

ap Hm\n-tm-^nen

s_w_mIvkv B\n-tam-^nen

[2 kvtIm; 3 an\nv]

Scoring Key



Categorises the kinds of pollination among the given plants.

Maize - Anemophily 12

Vallisneris - Hydrophily 12


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Jasminum - Entamophily 12

Bambax - Ornithophily 12 2 3

UNIT : II


C.O. - 17 : To understand fertilization in angisperms, development of embryo, endosperm,

fruits, seeds and special modes of reproduction.

Question Text

Give technical terms of the following explanation.

a) Formation of seedless fruits without fertilization. (1)

b) Organisms are formed from unfertilized female gamete. (1)


Xmsg sImSpnp hnhcWsf kqNnnp kmtXnI]Zw FgpXpI.

a) _oPke\neqsSmsX hnnm ^eapmIpI. (1)

b) _oPke\w \Sm s]_oPn \npw PohnbpmIpp. (1)


Scoring Key



Make connection to the given information.

(a) Parthenocarpy. 1

(b) Parthenogenesis 1 2 2

UNIT : I




Question Text

Give technical terms of the following explanations.

a) Formation of embryo from diploid tissue like nucellus and integuments. ( 12 )

b) Formation more than one embryo in the seeds. ( 12 )


Xmsg sImSpnp hnhcWsf kqNnnp kmtXnI]Zw FgpXpI.

a) UntmbnUmbnp \yqskkn\npw CUKpsan\npw {`qWw DmIpp.

( 12 )

b) Hcp hnn Hne[nIw {`qW DmIpp. ( 12 )



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Scoring Key



Communicates the knowledge to given information.

(a) Sporophytic budding1

2

(b) Polyembryony 12 1 1

UNIT : II

Chapter - 6 : PLANT GROWTH AND MOVEMENT

C.O. - 18 : To understand the plant growth patterns through experimentation.

Question Text

Observe the relationship the first one and fill in the second one.

a) Apical dominance : Auxin

fruit ripening : _________ ( 12 )

b) Flowering response to relative lenth of day and night : photoperiodism

Chilling treatement : _________ ( 12 )


Xnp BZy]ZfpsS _w Isn hnpt]mbh ]qcnnpI.

a) Gn tUman\kv - BIvkn

^ew]mIpXv ..................... ( 12 )

b) {]Imie`yXbpsS ssZLya\pkcnv kky ]pjv]npXv t^mtm]ocntbmUnkw.

NnnwKv {Sovsa v ..................... ( 12 )


Scoring Key



Communicates the knowledge to given information.

(a) Ethylere 12

(b) Vernalization 12 1 2

UNIT : I

Chapter - : PLANT WATER REALTION

C.O. - 18 : To understand the absorption and movement of water on plants, co-related

with the theories.

Question Text


a) Hypotonic solution : Endosmosis


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_________ : Exosmasis ( 12 )

b) Cell wall : apoplast

Cytoplasm : _________ ( 12 )



a) ssltmSWnIv tkmeyqj FtUmkvtamknkv

..................... FIvtkmtamknkv ( 12 )

b) tIi-`nn Atm-mv

tImi{Zhyw ..................... ( 12 )


Scoring Key



Communicates the relationship of the given terms.

(a) Hypertonic solution 12

(b) Symplast 12 1 2

UNIT : I

Chapter - : PLANT WATER REALTION

C.O. - 2 : To understand the process of water translocation, relation theories, mechnism

of water translocatin, transpiration, factors affecting and its significance.

4 : To understand the translocation of soluutes, related theories, nitrogen metabo-

lism and bilogical nitrogen fixation.

Question Text


a) Translocatin of solute: Stout and hoagland

Cohesion theory : _________ ( 12 )

b) Ooze out of water and sap from the cut end of the stem : exudation

water loss through stoma : _________ ( 12 )



a) {Smkv temtj Hm^v tkmfyqv uv & tlmKvem v

tImlnj Xnbdn ..................... ( 12 )

b) apdn`mKp\npw Pehpw tImi{Zhyhpw ]pdphcp {]{Inb FIvkyqtSj

Bkyc{fneqsSbp Pe\jvSw ..................... ( 12 )



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Scoring Key



Communicates the relationship

(a) Dixon and jolly 12

(b) Transpiration 12 1 2

UNIT : III

Chapter -8 : POPULATION, BIOTIC COMMUNITY AND SUCCESSION.

C.O. - 23 : To understand population, its characteristics, different types of ecological in-

teractions.

Question Text

In a biotic community, intially the population size was 250 during the year 2005 after a period of time

130 animals were died of forest fire 20 were nearly borne. During the next winter seasion 40 animals

emmigrated. During the next spring season 20 animals immigrated. Find out the change in population

size. What do you mean by the term population dynamics?


Hcp PohnhKn 2005 hjn PohnKWfpsS Fw 250 Bbncpp. IpdpImew

Igntm 30 PohnI acWaSp. 20 PohnI ]pXnbXmbn Dmbn. ASp apIm

eambtm 40 PohnI Fant{Kv sNbvXp. ASp hkImen 20 PohnI Cant{Kv

sNbvXp. PohnKWfpsS Fw Ip]nSnpI. t]mptej ssU\manIvkv sImv Fm

WY-am-p--Xv.


Scoring Key



Recollect and apply the formula

- Nt = No + B + I + D - E 1

for calculation

- Nt = 250 + 20 + 20 - 130 - 40

290 - 170

= 120 1 12

Change in population due to density disperssal and

age distribution. 12 3 5


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UNIT : III

Chapter -9 : ECOSYSTEM, STRUCTURE AND FUNCTION

C.O. - 23 : To udevelop an idea about the existence of different biomes in the biosphere.

Question Text

a) Identify the biome. ( 12 )

b) Compare the net productivity of this biome with a tropical rain forest. (1 12 )


a) Cu Nn{Xw GXv _tbmans\ kqNnnpp. (1

2 )b) Cu _tbmans s\v t{]mUIvSnhnn Hcp t{Smn sdbnt^mdpambn XmcXayw

sNpI. (1 12 )

[2 kvtIm; 3 an\nv]

Scoring Key



(a) Recognize the biome as desert biome. 12(b) Comparison based on the facts such as rate of

phortpsynthesis, availablity of nutrients in the soil. 1 12 2 3


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UNIT : I

Chapter -4 : PHOTOSYNTHESIS

C.O. - 10 : To understand the site of aerobic cellular respiration and its mechnism through

group discussion, flznnel board preparation assignments and experiments.

11 : To understand the mechanism of terminal oxidation

Question Text

A route map for cellular respiration is given below. By observing the diagram answer the following

questions.

a) Mention three main stages of cellular respiration is given in the diagram by indicating the letters A,

B and C. (1 12 )

b) Which stage is common to all aerobic and anaerobic respiration. Mention its site. (1 12 )

c) Write the role of mitochondrion in cellular respiration. (1)[4 score; 6 minutes]

skpemsdkv]ntdjs Hcp dq vamv Xncnpp. Nn{Xw \nconv Xmsg sImSpnptNmZyv DcsagpXpI.

a) skpem sdkv]ntdjs A, B, C Fns\ tcJsSpnbnp aqpLsfgp

XpI. (1 12 )

b) hmbpizk\nepw Ahmbpizk\nepw s]mXphmbp LtaXv? (1 12 )

c) tImiizk\n ssatmtIm{UnbmbpsS ]sv? (1)



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Scoring Key



Identify, the stages of cellular respiration.

(a) A - glycolysis1

2

B - kerbs cylce 12

C - electron transport system 1 12Recognises the common stage and its site.

(b) - glycolysis 12

- cytoplasm/cytosol 12Communicate the knowledge to new situation.

(c) - any one point i.e., related to energy synthesis. 1 4 6

UNIT : I

Chapter -4 : RESPIRATION

C.O. - 12 : To get an idea about the alternative patterns of aerobic respiration and mecha-

nism of anaerobic respiration in plants.

Question Text

a) Identify the given schematic respiration. (1)

b) X, Y letters in the given boxes represent the substrate and end products of the process. Write its

name. (1)

c) What are the industrial purposes of this process. (1)


a) Xncnp Nn{XoIcWw Fns\ kqNnnpp. (1)

b) {]{InbbpsS Ds kqNnnp X, Y Fo Iffn AhbpsS t]scgpXpI.

(1)


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c) Cu {]{InbbpsS hymhkmbnI Dtiyw Fv? ( 12 )


Scoring Key



Identifies

(a) Anaerobic respiration - fermentation 1

Recognises

(b) X - substrate - glucose 12

Y - end product - ethyl/alcohol. 12Relates prior knowledge to new information like

(c) baking/brewing industries 1 3 5

UNIT : III

Chapter -10 : NATURAL RESOURCES AND THEIR CONSERVATION

C.O. - 27 : To understand the various type of natural resources and their misuse and the

necessity of conservation.

Question Text

State the reason of the following.

a) Mangroves are called costal guard. (1)

b) Ploughing up grass land increase nitrogen but not phosphate levels in the near by lakes. (1)


Xmsg ]dbphbpsS ImcWsfgXpI.

a) IsNSnIfpsS XoctZikwcI Fv ]dbm ImcWw. (1)

b) XSmIcbnse ]p{]tZiw DgpXpadnpXneqsS ss\{SPs Afhv IqSpsanepw

t^mkv^dkns Afhv Ipdbm ImcWw. (1)


Scoring Key


Score Score (Minutes)Relates the prior knowledge to new informations.

(a) - control Tusnami

- identifies the function, structure of preumatophres. 1

(b) Leaching 1 2 4

UNIT : II

Chapter - 6 : PLANT GROWTH AND MOVEMENT

13 : PLANT TISSUE CULTURE AND BIOTECHNOLOGY

C.O. - 19 : To understand the nature and effect of different hormones.


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33 : To understand bio-fertilizers, biopesticides, significance, importance of bio-tech-

nology in producing GMF and misuse of biological information.

Question Text

Reson the following.

a) Gardener after pinch off the terminal shoot apex to stimulate the bushiness in youg plants.(1)

b) Basumati rice is indegeneous to our country but it is under the control of USA. (1)


ImcWw hyampI.

a) ]qtmmc sNSnIfpsS A{K`mKw apdnpIfv IpnsNSnIfmn ammdpv. sNSn

IfpsS Ccnep hfbpsS ImcWw. (1)

b) _kpaXn Acn \psS Hcp \mS C\amWv ]s AXns AhImiw Ctm Ata

cn--m-Wv. (1)


Scoring Key



(a) - Excess growth of lateral buds

- Downward conduction of auxin 1

(b) Biopatent to Basmati rice 1 2 5

UNIT : III

Chapter -10 : ECOSYSTEM, STRUCTURE AND FUNCTION

C.O. - 24 : To understand the structure and functions of ecosystem.

Question Text

Consider a pond ecosystem.

a) Draw the pyramid of energy in that ecosystem. (1)

b) Compare three types of pyramidal relationship found among the organisms in pond ecosystem.

(1)

c) Is there any difference between nutrient flow and energy flow in an ecosystem? Substantiate.

(1)


Ipfw Hcp Bhmkhyhbmbn IcpXpI.

a) B Ipfnse Bhmkhyhsb ASnm\sSpn DuP]ncanUv hcbvI. (1)

b) aqpXcnep ]ncanUpIsf Ifnse PohPmefpsS ASnm\n XmcXayw

sNpI. (1)

c) {Zhy{]hmlhpw DuP{]hmlhpw Xn Fsms hyXymkfpv. (1)



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Scoring Key



(a) Construct the upright pyramid of energy.

1

(b) Compare the pyramid of number, energy and biomass

- Pyramid of number and energy is upright and pyramid

of bioms is inverted in pond. 2

(c) Compose and arrived at conclusion, that

- Energy flow is unidixctronal, but nutrient flow is in

cyclic manner. 1

- The amount of energy flow decreases with successive

trophic level but no such variation in nutrient cycling. 1 5 8

UNIT : I

Chapter -3 : PHOTOSYNTHESIS

C.O. - 6 : To understand the mechanism of pholochemical and bisynthetic phases of pho-

tosynthesis.

Question Text

Observe the details of plant A and B in the given table.

Plant A Normal CO2

H2O with radio-active oxygen

Plant B CO2with radioactive oxygen Normal water

Both plants A and B are allowed to carry out photosynthesis, oxygen gas and sugars are tested for

radioactivity.

Identify the plant that produce radio-active sugar and radio-active oxygen. Justify.


]nIbn sImSpnp A, B Fo kkysfpdnp hnhc a\knemq.

kkyw A km[m-cW CO2

tdUntbm BIvSohv O2

D H2O

kkyw B tdUntbm BIvSohv O2

km[mcW H2O

D CO2

kky-- A tbbpw B tbbpw {]ImikwtjWn\\phZnn v HmIvknPsbpw ]kmcbptSbpw tdUntbm BIvSohnn sSv sNbvXm GXv kkyamIpw tdUntbm BIvSohv HmIvkn

decomposers

consumers

producers


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Ps kmn[yw ImWnpI GXv kkyamIpw tdUntbm BIvSohv ]kmcbpsS kmn[ywImWnpI.


Scoring Key

Scoring Indicators Stage Total TimeScore Score (Minutes)

Categorise, connect the knowledge and arrive at conclussion.

- plant A liberate O2shows radioactivity.

- plant B fixes CO2in the form of sugar shows radioactivity

Reason out the liberation of radioactive oxygen and radioactive

sugar

In plant A - radioactive oxygen is evolved from splitting of H2O

with radioactive oxygen.

In plant B - produces sugar with radioactive oxygen

of carbondioxide. 3 3 5

UNIT : II

Chapter -5 : REPRODUCTION

C.O. - 17 : To understand fertilisation in angiosperms, development of embryo endosperm.

Question Text

Haploidy diploidy and triploidy are the chromosome conditions exist in angiosperm parts from a seed

is given below. Find out the chromosome condition of each part.

1. Integuments - outer, inner 2. Nucellus

3. Secondary nucles 4. Zygote

5. Primary endosperm nucleus

6. Normally embryo develops from zygote.

Write down the other parts from which embryos can develop.


BPntbmkvt] apIfn lmtmbnUn, UntmbnUn, {SntmbnUn Fo t{Imatkmw AhI ImWsSpp. Xmsg sImSpnp hnns mKfpsS t{Imatkmw Ah FgpXpI.

1. Integuments - outer, inner 2. Nucellus

3. Secondary nucles 4. zygote

5. Primary endosperm nucleus

6. km[mcWbmbn {`qWw hnIknv knmfiambn amdpp.

atsXmw `mKw knmfiambn amdmw.



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Scoring Key



(a) Correct all the ploidy conditions.

a, b, c, d diploid C. triploid 3Arrive at the conclusion that

embryo can developed nucellus, integuments, synergids,

antripolals etc 2 5 5

UNIT : II


C.O. - 17 : To understand fertilization in angiosperms, development of emtryo cendosperm.

Question Text

The diagram shows the developmental stages of embryosac Panchanan Maheswari, the embryologist

classified this type of developmnet as monosporic type.

a) Which term is generally appled to this? (1)

b) Why do the developments are categorised as bisporic, tetrasponic etc. (1)

c) If more than one megaspore is involved. What change can you observe in the structure of

ovule. (1)


Xmsg sImSp-n-cn-p Nn{X-n Fw{_n-tbm-km-ns hfm-L- - ImWn-n-cn-p-p. Fw{_ntbmfPnmb {io ]m\ atlizcn Cu hfmcoXnsb tamtWmkvt]mdnIvFv ]dbpp.

a) GXv ]ZamWv Cu coXnv D]tbmKnpXv. (1)

b) ss_kvt]m-dnIv Fpw sS{Sm-kvs]-dnIv Fpw Fp-sIm-mWv Xcw Xncn--dn-p-

-Xv. (1)

c) {]h\n Gsm Hmhyqfns LS\ Fmbncnpw. (1)



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Scoring Key



(a) Polygonam type 1

(b) Based on the number of megaspores involved. 1(c) Arrives at the conclusion that more than one embryosac

can be seen (2 + 4) 1 3 4

UNIT : II


C.O. - 16 : To understand pollination and its tyes etc.

Question Text

Structure of pollen grain is given in the diagram

a) How many germ pores are seen in dicots and monocots. Write its importance. (1)

b) In which stage, microspores are released from the anther. Draw this stage of microspore and

label its parts. (2)

c) Write the role of pollengrains during fertilization. (1)

[4 score; 3 minutes]]cmKtcWphns LS\ Nn{Xn sImSpncnpp.

a) GI]{X kkyfnepw Zzn]{Xkkyfnepw F{X tPwt]mdpI ImWsSpp. Fm

WnXns {]m[m\yw.(1)

b) GXhbnemWv ssat{Imkvt]mdpI BXdn \npw tamNnsSpXv. Nn{Xw

hcv ASbmfsSppI (2)

c) _oPke\kabv ]cmKtcWpfpsS [asav? (1)


Scoring Key



(a) Dicot. 3 monocot 1/formation of pollentube during

pollen germination 1

(b) 2 celled stage - vegetative or generative + for drawing 2


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(c) Carries the 2 male gametes/one involved in syngamy

another in triple fusion. 1 3 4

UNIT : II




Question Text

Endosperm is seen both in gymonsperms and angiosperm if the chromosome number of pea is 2n - 14

and of pinus 2n = 24 Find the chromosome number of its embryo, endosperm and gametes with

reasons.


Pnt\m-kvt]-ap-I-fnepw BPn-tbm-kvt]-ap-I-fnepw FtUmkv]w ImW-s-Sp-p. ]b sNSn-

bpsS t{Imtamtkmw \ 2n - 14 Dw ss]\kns t{Imtamtkmw 2n = 24 Dw BsWnAXn\nv cq]w-sIm-p Fw{_n-tbm-bp-tSbpw FtUm-kvs]-an-tbpw Kao-p-I-fp-tSbpwt{ImtamtkmwkwJy FgpXpI.


Scoring Key



For writing the correct chromosome numbers 1

Finding out in angiosperm it is diploid 3 4 3

UNIT : II




Question Text

In the immature rice seed milky substances can be seen. Identify that part? What is its nuclear condi-

tion? How is it formed? What change can be seen when seeds mature.


s\hnn ]mIamIpwapv ImWsSp ]mept]mep ]ZmYw FmWv? AXns tImih FmWv? Fs\bmWnXv cq]wsImpXv? hnv ]mIamIptm CXns AhbnepmIp amw FmWv?


Scoring Key



Identifies as endosperm, triploid/after fertilization 1

By free nuclear division it turn to cellular. 1 2 3


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UNIT :

Chapter - 2 : ........

C.O. - 3 : To understand different types, role, source and deficiency symptoms of macro

and micro nutrient in plants.

Question Text

Observe the digram and answer the following.

a) This is a peculiar type of plant contivation - name it. (1)

b) Point out its significance. (1)

c) Routine bubbling of air in the medium is needed in this method. Clarify. (2)


XmsgXncnp Ub{Kw {inp NphsS Xncnp tNmZyv Dcw FgpXpI.

a) Nn{Xn ImWnncnp {]tXyIXc IrjncoXnbntesXv XncndnsgpXpI.(1)

b) Cu coXnbpsS {]m[m\ysfsmw? (1)

c) aoUnbn\Iv XpSbmb hmbp{]hmlw km[yamtXns BhiyIX hyampI. (2)


Scoring Key



(a) Hydroponics/soil less culture/water culture 1

(b) To study the deficiency symptoms of essential elements 1

To group plants artifically for economic purpose 1(c) To provide sufficient O2 to the root system. 1 4 5


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UNIT :

Chapter - 2 : ........

C.O. - 3 : To understand the translocation of solution relates theories, N2

metabolism

and biological N2fixation through group discussion etc.

Question Text

A scientist is trying to produce transgenic plants like wheat and rice varities with bacterial nif and fix

genes. If he suceeds in his attempt. What will be its impart on agriculture.


Hcp imkv{X, _mIvSocnbbpsS \n v, nIvkv Fo Po\pIfp]tbmKnpsImv {SmkvP\nmb s\v, tKmXv hK DXv]mZnnm {ianpp. Ctlw Cu {ian hnPbnpIbmsWn Irjnbn CXn\v Fv kzm[o\ammm km[npI.


Scoring Key



Baceterial nif and fix genes are the N2fixing genes.

By inserting them into plants like rice, wheat, these plants can

independently fix the atmospheric N2- leads to increase the soil

fertility and yield. 2 2 4

UNIT :

Chapter - : ........

C.O. - 18 : To understand the growth patterns.

19 : To understand the nature and effect of different hormones.

Question Text

In a jack fruit tree, during rainy season, some seeds are undergoing germination inside the fruit.

(a) Name the phenomenon. (1)

(b) Relate and compare this phenomena with the activity of phytohromones. (2)


agmev Hcp mhn ImWp Nne NIfn hnpI apfphcpXmbn ImWpp.

(a) Cu {]Xn`mkns t]scgpXpI. (1)

(b) Cu {]Xn`mks sNSnbnse tlmtamWpIfpambn _nnv hniZampI. (2)


Scoring Key



(a) Vivipary 1(b) ABA responsible for drmancy


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(a) Identify the phenomenon.

(b) List out its consequences.

(c) Suggest any two methods to control this phenomenon.

[4 score; 8 minutes]Xncnp Nn{Xw \nconpI.

(a) Xncnp Nn{Xn ImWnncnp {]Xn`mkns t]scgpXpI.

(b) Cu {]Xn`mkns A\c^e hyampI.

(c) CXv XSbpXn\mhiyamb GsXnepw cv amK FgpXpI.

[4 score; 8 minutes

]

Absence causes vivipary

During rain ABA washed of into water leading the seeds

to germinate. 2 3 5

UNIT :

Chapter - : ........

C.O. - 28 : To understand the different types of pollunation, pollutents, sources, effect

and control measures through seminar. Prepare notes and seminar papers.

Question Text

Observe the diagram and answer the following.


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Scoring Key



(a) Acid rain 1

(b) - Damages to national monuments1

2

- Adversly affect vegetation. 12

- Most planktons of mollusces cant grow below pH5 12

- Damages to soil mircobial community. 12(c) - Control automobile exaust using catatytic converts

- Use electro-solution precipitator in industry

- Use CNG like fuels in vechicle. (any two) 1 4 8

UNIT :

Chapter - : ........

C.O. - 28 : To understand the different types of pollunation, pollutents, sources, effectand control measures through seminar. Prepare notes and seminar papers.

Question Text

The average DDT concentration in a pond and different groups of organisms in a plantation village area

is given as follows. Analyse the data and answer the following.

Pond water 0.0025 ppm

Phyto plankton 0.0025 ppm

200 planktons 0.123 ppm

Small fishes 1.04 ppm

Predatory fishes 4.833 ppm

Fish eating birds 124 ppm

(a) Suggest the reason for the higher concentration of DDT in the area.

(b) Fish eating birds of this area have higher DDT concentration in their body. Justify.


Hcp mtj Gcnbbnse Hcp Ipfn ImWsSp DDT bpsS GItZi Afhv XmsgImWn-n-cn-p-p.

Ipfnse Pew 0.0025 ppm

kkyhI 0.0025 ppm

PphI 0.123 ppm

sNdpay 1.04 ppm

henbay 4.833 ppm

ays `np ]nI 124 ppm

(a) Cu `mKv DDT bpsS Afhv IqSm\p ImcWsambncnpw.

(b) aysf Blcnp ]nIfnemWv Ghpw IqSpX DDT ImWsSpXv. hni

Zamn \ymboIcnpI.



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Scoring Key



(a) Use of DDT as a pesticicle in the plantation. 1

(b) Non-biodegradable DDT shows biomagnificationand is higher in top. 2 3 4

UNIT :

Chapter - : ........

C.O. - 28 : To understand the different types of pollution, pollutants, sources, effect and

control measures through seminar. Prepare notes and seminar papers.

Question Text

Following are some examples of air pollutants. Classify them into primary and secondary based on their

form.

Hydrocarbons, Ozone, Nitrogen oxides, PAN, SO2, Photochemical smog, CO

2, Acid rain.


Xmsgncnp aen\oImcnIsf AhbpsS Ah a\knemn ss{]adn Fpw skdnFpw hniZamn amn FgpXIp.

sslt{UmIm_WpI, Hmtkm, ss\{SP HmImsskUpI, PAN, k^ ssUHmIvsskUpI, t^mtmsIan kvtamKv, Im_ ssU HmIvsskUv, Awag.


Scoring Key

Scoring Indicators Stage Total TimeScore Score (Minutes)

Primary pollutents Secondary pollutents

CO2

Photochemical smog

Nitrogen oxides Acid rain

Hydrocarbons PAN

SO2

Ozone

UNIT :

Chapter - : ........

C.O. - 28 : To understand the different types of pollunation, pollutents, sources, effect

and control measures through seminar. Prepare notes and seminar papers.

Question Text

Look at the picture given below. The above given notice was awarded 1st prize in a competition hold

in connection with world environmental day by an Eco Club.

a) When is world environmental day observed.

b) Elucidate the message of the notice.

c) Write any two global actions taken for the above issue.


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temI-]-cn-n-Xn-Zn-\-hp-ambn _-s v Hcp ]cn-nXn _v \S-nb a-c-n Hmwm\w Innb Cu t\mokv {in-p-h-tm.

a) FmWv temI]cnnXnZ\ambn BNcnpXv.

b) Cu t\mo-kns ktiw hy-am-p-I.

c) CXn {]Xn-]m-Zn-n-cn-p {]iv\-n-s\-Xn-cmbn BtKm-f-X-e-n-ep cv \S-]Sn/\nabsfgpXpI.

[2 score; 4 minutes]Scoring Key



(a) June 5th 1

(b) The crualty of man will ultimately lead to our worlds

destruction itself. 1

(c) 1. Environmental Protection Act - 1986 12

2. The water (prevention and control of pollution) Act - 1974. 12 3 5


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UNIT :

Chapter - : ........

C.O. - 29 : To understand the causes and effects of global envrionmental changes due to

green house gases and its consequences through panel discussion.

Question Text

Analyses the given graph and answer the following

a) Indicate the trend of CO2.

b) Temperature and CO2concentration in atmposphere are directly related. Justify.

c) Mention the international initiatives to minimise the release of CO2and other gases which in-

crease the atmpospheric temperature.


Xncnp {Km^v \nconpI.

a) CO2s {]h\w tcJsSppI.

b) NqSpw Aconse CO2s Afhpw ]ckv]cw _sncnpp. \ymboIcnpI.c) Aco Dujvamhv Dbm ImcWamIp CO

2t]mep hmXIfpsS Afhv

IpdvsImphcpXn\v Amcmjv{SXenep \S]SnIsf hyampI.


Scoring Key



(a) Temperature increases from 1959 to 2001. 1

(b) Increase in CO2together with temperature. Increase the rate

of photosynthesis leads to CO2 fertlization effect. 1(c) Kyoto protocol 12

Montreal protocol 12 3 5


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UNIT :

Chapter - : ........

C.O. - 30 : To understand the crop improvement techniques through group discussion,

Instituion visit etc.

Question Text

In a population of Chilli (capsicum sps), some of the plants are more vigorous than the others with large

leaves, flowers and fruits compared to other normal plants.

(hint: Normal plants are diploid)

a) Give the difference between the chromosome constituiton of these plants with the normal plants.

b) Suggest an artifical method to indicate varation in the number of chromosmes of a plant.


apfIv sNSnIfpsS Hcp kaqln aphbn\nv hyXykvXambn henb CeIfpw ]qfpw

ImbIfpw D Nne sNSnI ImWsSpp.(kqN\: km[m-cW-sN-Sn-I Untm-bn-Um-Wv)

a) Cu sNSnIfpw km[mcWsNSnIfpw Xn P\nXILS\bnep hyXymkw hyampI.

b) Hcp sNSnbn t{Imtamtkmw \ amw Dfhmm ImcWamIp Hcp {In{XnaamKw\nt-in-p-I.


Scoring Key



(a) Polyploid condition attained by the cells. 1

(b) Mulation breeding

- Mulation indiced/spontaneous

- Induced multation by mutagents like

uv, X-rays or chemicals. 1 2 4

UNIT :

Chapter - : ........

C.O. - 32 : To understand the steps and techniques used for plant tissue culture and its

significance through institutional visit and group discussion.

Question Text

Arun tried to develop haploid datura plants by tissue culture method and suceeded in it. But by

thorough examination of the culture he found both that some plants are diploid in nature.

a) Identify the part of datura plant that is used as the explant by Arun.

b) List out the significance of haploid plants.

d) Give reason for the production of both haploids and diploids in the same culture.


lm]vtembnUv Bb Upd (Dw) sNSnIsf SnjypI hgn D]mZnnpXn hnPbnAcp, kqva ]cntim[\bn UntmbnUmb sNSnI IqSn Xs Idn DsvXncn--dn-bp-p.


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a) Acp sNSnbpsS GXv `mKap]tbmKnmbncnmw SnjyqI \SnbXv.

b) lm]vtembnUmb sNSnIfpsS {]m[m\ysav?

c) Htc Idn lm]vtembnUpw UntmbnUpamb sNSnI ImWsSm\p ImcWwhyampI.

[2 score; 4 minutes]Scoring Key



(a) - Anther 1

(b) - Sterile plants produced

- Used to develop homozygous plants. 1

(c) - Haploid plants from pollengrains.

- Diploid from the anther wall cells.1 3 5

UNIT :

Chapter - : ........

C.O. - 31 : To understand the common discussion of plants and animals, cause, symptoms,

spreeding and control measures.

Question Text

Observe the relation in the first pair and fillup the blank in the second.

a) Control the insect vecto r: Virues

Flooding of the field : ..............b) Pustules : Fungi

Pitting : ..............


BZys cv ]ZfpsS _w ]cntim[nv sXmpXmsg sImSp]Zn\v B\ptbmPyamb ]Zw Isn FgpXpI.

a) jUv_ZhmlIsc \nb{npI : sshdkv

hben shw sIn \npI : ..............

b) ]yqfpI : ^wKkv]nnwKv : ..............


Scoring Key



(a) Nematodes 12

(b) Viruses 12 1 1


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UNIT :

Chapter - : ........

C.O. - 31 : To understand the common discussion of plants and animals, cause, symptoms,

spreeding and control measures.

Question Text

Following are symptomes shown by a diseased bringal plant.

1) Root knots

2) Root tesions

3) Excessive root branching

4) Reduced growth of shoots

5) Yellowing

a) Name the causative organism.

b) Suggest any two control measures.[2 score; 3 minutes]

Xncnp tcmKeW {inv tNmZyv Dcw FgpXpI.

1) thcn sIepIfpmhpI

2) thcn No `mK

3) thcv {Iam[oXambn imJIfmIpI

4) Imfins hf IpdbpI

5) afnv

a) tcmKImcn BscsgpXpI.

b) GsXnepw cv \nb{WamK FgpXpI.


Scoring Key



(a) Nematodes 1

(b) Any two

- Resistant variety

- Pathogen free seeds

- Chemicals

- Flooding the field 1 2 3

UNIT :

Chapter - : ........

C.O. - 32 : To understand the steps and techniques used for plant tissue culture and its

significance through instituional visit and group discussion.

Question Text

Raju is working in an Agricultural Research Station and is directed to provide large number of plants

like banana, orchids, haploid varieties of watermelon and two medicinal plants whose leaves and rootsare used as medicines.


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a) Write the most suitable method that Raju can adopt.

b) Give any three advantages of this method.

c) In banana, the shoot apicalmeristem is used to produce large number of plants. What is the

advantage of this. clarify.

[4 score; 6 minutes]Hcp ImjnI KthjW m]\n tPmenmc\mb cmPhnt\mSv, hmg, HmnUv, lm]ntembnUmb Xna, thcpw CeIfpw acppIfmbn D]tbmKnp cv sNSnI FnhbpsS [mcmfw sNSnI hfnsbSpm\v BhiysSpp.

a) cmPphn\v kzoIcnmhp Ghpw Ffpamb amKtaXv?

a) Cu amKns GsXnepw cv taIsfgpXpI.

b) hmgbn Imfins Asacnv D]tbmKnv [mcmfw sNSnI \nanmdpv. CXnsGhpw {][m\s tasbv? hniZampI.


Scoring KeyScoring Indicators Stage Total Time


(a) Tissue culture 12

(b) Any three advantage like

- short time

- large number

- identical

- non sesonal 1 12

(c) To develop viral free plants.

Shoot apex due to the absence of conductive tissue normally

not infected with virus. 2 4 6

UNIT :

Chapter - : ........

C.O. - 33 : To understand bioferlizer, significance, importance of biotechnlogy in produc-

ing GMF.

Question Text

Insulin in man is normally produced by the cells of the pancreas. But now a days it is commercially

produced from bacertia like E.coli and marketed as humulin.

Explain how this was made possible.


a\p-jy-]m{In-bm-knse _om-tIm-i--fmWv km[m-c-W-bmbn Ckp-en DXv]m-Zn-n-m-dp-Xv. Fm lypapen F hyhkmbn\manep Ckpen Cv E.coli t]mep_mIvSocnbIfn\npw \nansSpp.

CsXs\ km[yamsbv hniZampI.



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Scoring Key



- By biotechnology/recombinant DNA technolgy

- Isolation of desirel genefrom any organism- Transfer and expression in other organisms of choile

UNIT :

Chapter - : ........


ing GMF.

Question Text

Organic fertilizers are better than chemical fertilizers. Do you agree with the statement. Justify your

answer.


ssPhhffmWv cmkhfsfm sasXv. Cu {]kvXmh\tbmSv \n tbmPnpptm? \ymboIcnp.


Scoring Key



- Chemical fertilization can use hazardness to all organisms

including man.- Chemical fertilizers are expensive.

- Use resources of energy for prouduction.

- Biofertilizers non polluting and less expensive. 2 2 3

UNIT :

Chapter - : ........


ing GMF.

Question Text

While visiting a paddy field, Raju notices that a farmer is adding a mixture containing Acetobactorbacertium in soil before sawing the seeds.

a) Write the role and importance of this bacterium in agriculture.

b) give any two other micro-organisms which can have the same role.


Hcp hb kin\nSbmb cmPp, Hcp ImjI hnv ]mIpXn\v aptmSnbmbn Aktm_mIv F _mIvSob ASnb Hcp an{inXw hben hnXdpXmbn ImWpp.

a) ImjnIcwKv Cu _mIvSocnbIfpsS [ahpw {]m[m\yhpw hyamp.

b)CtX [aw \nhlnp av cv _mIvSocnbIv DZmlcWsagpXpI.



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Scoring Key



(a) - As biofertilizer

- Free living N2 fixing organisms - brings soil nutrientenrichment

- Non-polluting fertilizer 2

(b) Any two 1 3 4

botany02-model papers of kerala board of higher secondary education, xiith class

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