BIOL 215 Lecture Notes - Lecture 8: Chitin, Lycopodiopsida, Penicillin
25 Jan 2018
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10:15 am: not closest relative (early days, used to place these next to each other, more related to fungi. Plants: a story of transition form water to land: they evolved from green algae (aquatic seaweed, plants are multicellular eukaryotes, possess cellulose rich cell walls, they are photoautotrophic, alternation of generations. 24 families of plants (need to know groups) Angiosperms (flowering plants) = the abominable mystery because there are so many of them/they are so diverse. Alternation generations: go through diploid and haploid stage. Some groups = whole life in haploid, some = whole life in diploid. 4 major evolutionary inventions in plants: the seed: major evolutionary invention. Some of earliest land plants: **don"t have vascular tissue/true roots to transport water and nutrients, thrive in damp places (but can withstand drought) Lack lignan to strengthen cell walls, means they have to stay close to the ground. Simplest land plants, limited to moist environments: paraphyletic group: liverworts, mosses, club mosses, hornworts.
