StudentsGrades posted on white board highlights are not goodTest infoAvg = 30.5, range: 17 48Corrections due MondayBrief syllabusPlants nextCh 29 - 30, 10 (photosynthesis), 35 39Photosynthesis lab next weekTornado drill today 2nd periodTransport Friday tomorrowAP exam payment???

Chapter 29: Bryophytes & FernsWhat adaptations do plants have for survival on land?Stomata pores used for gas exchangeRoots absorb water & minerals from undergroundApical meristems tips of shoots & roots where growth occursCuticle waxy covering to prevent water loss thru leavesJacketed gametangia gamete producing organ with protective jacket of cells to prevent dehydration- Sporopollenin polymer that formed around exposed zygotes & forms walls of plant spores preventing dehydrationLignin structural polymer that provides strength for woody tissues

Chapter 29: Bryophytes & FernsWhat adaptations do plants have for survival on land?What were the adaptations/highlights of plant evolution?Movement to land led to Bryophytes (mosses & worts)Tougher spores (sporopollenin)Jacketed gametangiaVascular tissue (ferns)Cells joined to transport water & nutrientsLacked seedsDevelopment of seeds (Gymnosperms)More protection of embryoEmbryo w/ food Development of flowers (Angiosperms)Complex reproductive structure

Figure 29.7Highlights of plant evolution

Chapter 29: Bryophytes & FernsWhat adaptations do plants have for survival on land?What were the adaptations/highlights of plant evolution?Movement to land led to Bryophytes (mosses & worts)Tougher spores (sporopollenin)Jacketed gametangiaVascular tissue (ferns)Cells joined to transport water & nutrientsLacked seedsDevelopment of seeds (Gymnosperms)More protection of embryoEmbryo w/ food Development of flowers (Angiosperms)Complex reproductive structureWhat are bryophytes?Non-vascular plantsMosses & wortsDominant life stage is haploid gametophyteReproductive structures Male antheridia produce flagellated spermFemale archegonia produce 1 egg (ovum)

Figure 29.8 The life cycle of a Polytrichum moss

Figure 29.8 The life cycle of a Polytrichum moss

Figure 29.8 The life cycle of a Polytrichum moss

Figure 29.9 Bryophyte Diversity

InfoPlants divided into 2 units-Ch 29 - 30, 10, & 35 test Friday, 3/16 -Ch 36 39 test Monday 3/26

Transport today all day & 4:30All corrections due MONDAY

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Figure 29.10Sphagnum, or peat moss: a bryophyte with economic, ecological, and archaeological significanceCloseup of Sphagnum. Note the leafy gametophytes and their offspring, the sporophytes.(b)Covers 3% of landStabilizes greenhouse effect

Chapter 29: Bryophytes & FernsWhat adaptations do plants have for survival on land?What were the adaptations/highlights of plant evolution?What are bryophytes?What are the characteristics of ferns (seedless vascular plants)?Dominant life stage is sporophyte (2n)Gametophyte is reducedSporophyte is branchedVasculatureXylem transports water & minerals up from the groundHas tracheids tube-shaped cells for transportDead at maturityStrengthened by ligninPhloemTransport sugars & other organic products from leaves downward Living cells at maturityRoots - anchorage, water & mineral transportLets consider the life cycle..

Figure 29.12The life cycle of a fern Fern sperm use flagellato swim from the antheridia to eggs in the archegonia.4 Sporangia release spores.Most fern species produce a singletype of spore that gives rise to abisexual gametophyte.1 The fern sporedevelops into a small,photosynthetic gametophyte.2 Although this illustration shows an egg and sperm from the same gametophyte, a variety of mechanismspromote cross-fertilizationbetween gametophytes.3 On the undersideof the sporophytesreproductive leavesare spots called sori.Each sorus is acluster of sporangia.6 A zygote develops into a newsporophyte, and the young plantgrows out from an archegoniumof its parent, the gametophyte.5MEIOSISSporangiumSporangiumMaturesporophyteNewsporophyteZygoteFERTILIZATIONArchegoniumEggHaploid (n)Diploid (2n)SporeYounggametophyteFiddleheadAntheridiumSpermGametophyteKeySorus

Chapter 29: Bryophytes & FernsWhat adaptations do plants have for survival on land?What were the adaptations/highlights of plant evolution?What are bryophytes?What are the characteristics of ferns (seedless vascular plants)?What is the difference between homosporous & heterosporous plants?Most fernsAll seed plants & few seedless plants

Figure 29.14 Seedless Vascular Plant Diversity

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