BIOA02H3 Lecture Notes - Lecture 4: Bark, Bioavailability, Chemical Warfare

• School: UTSC
• Department: Biological Sciences
• Course: BIOA02H3
• Professor: Ivana Stehlik

Document Summary

At -3700 years is the rst fossilized evidence of bacteria (heterotrophic), till mid proterozoic(mesoproterozoic) Bryophytes: liverworts (6 000, mosses (12 000, mosses(different group, hornworts (100) Vascular plants: lycophytes (1 200, ferns (12 000) Seed plants: gymnosperms (900, angiosperms (270 000) -located where there is moisture (bc, 1531 mm annual rain) Cuticle (top layer of epidermis made of hydrophobic substance which seals leaf from above and below to prevent water loss) Loss and uptake of water along whole surface. Adapted to loss waster thus better for survival thru total desiccation. No vascular system (xylem which transports water, phloem which transports sugars). Doesn"t keep plant standing upright, part of xylem, thus they are smaller. Males will grow tiny palm tree like structures on top (antheridia) Females will grow umbrella shape structure which contain female structure (archegonia) Once they start reproducing, they look look like horns. Plant fertilization (syngamy) diploid generation (2n) eg: moss.