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EOF NOTES FOR BIOLOGY 101 EXAM TWO

EOF NOTES FOR BIOLOGY 101 EXAM TWO - EOF NOTES FOR BIOLOGY...

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EOF NOTES FOR BIOLOGY 101 EXAM TWO Mosses and Ferns Evolution of land plants The oldest fosils are 425 mill years old this is 3 bill after the frst autotrophic cyanobacteria Special adaptations were required 1. A wacy cuticle help prevent the plant disuse from dieing out due to evaporation 2. Most plans possess multicellular sex organs called gametangia which protect the delicat gamets that they produce 3. To facilitate gas exchane tiny pores called stomata are present in the waxy cuticle 4. Antheriduim male 5. archegonia femal 6. In plans after fertilization the zygoe develops into a multicellular embro inside the achegonim thus the embro is protected during its development. 7. Ferns gymnosperms and angiosperms possess vascular tissues Tissues used for movement of materials throughout the plant body 8. Lignen Strengthening polymer found in the walls of cells that function for support and transport. 9. the vasculat tissue in these groups is arranged in specialized organs Roots Leaves Stems Mosses: dominant gametophyte Sporophyte dependent on the gametophyte No tru vascular tissue Get materials by capillary action and diffusion Flagellated sperm swim to the egg Ferns Dominant Sporophyte but gametophyte is independent Some vascular tissue Sperm swim to egg No seeds
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