bio- chap 29

bio- chap 29 - Chapter 29 I. Overview of Plant Evolution A....

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Chapter 29 I. Overview of Plant Evolution A. terrestrial orgs.- resources in two different places 1. light and CO2 above ground 2. water and nutrients in soil 3. stomata- gas exchange 4. cuticle- prevents water loss 5. secondary products a. waxes of cuticles b. are not produced by primary mainstream metabolic pathways c. lignin in hard woody plants d. sporopollenin: polymer resistant to almost all kind of environmental damage B. Embryotes 1. produced gametes w/in gametangia that have protective sterle jackets 2. key adaptations to success on land 3. gametophyte: multicellular individual w/ haploid cells 4. sporophyte: multicellular w/ iploid cells C. Plant Diversity 1. origin of plants from aquatic ancestors 2. vascular tissues: cells to tubes for transport eveolved early in plants history 3. diversification of vascular plants 4. origin of the seed: gymnosperms and angiosperms II. Origin of Plants A. prob evolved from charophytes- green algae B. homolgies between charophytes and plants
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bio- chap 29 - Chapter 29 I. Overview of Plant Evolution A....

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