BIOL10005 Lecture Notes - Lecture 22: Meiosis, Sphagnum, Marchantiophyta
15 Aug 2018
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Document Summary
*marine animals were highly evolved relative to plants prior to their movement onto land they were read to go. * animals established their body plans prior to colonization of the land. * land plants development their body plans after they colonized terrestrial environments. * the green algae (chlorophyta) are the closest relatives of land plants. * the green algal genus, coleochaeta (charaphyta), is the most likely ancestor this is because of the manner in which they divided & nature of gametes (sex cells spermatia have cork screw like structure) is similar. * key data are both morphological & molecular. * structural support (e. g. tall trees, need way to transport water) Key adaptation that plants made in order to invade land: * cuticle waxy coating on outside of leaves prevents leaves from drying out. * stomata; gas exchange pores in surface of leaf that open and close to let in carbon dioxide.
