BIO 102 Lecture Notes - Lecture 11: Viridiplantae, Chlorophyta, Antheridium

• School: URI
• Department: Biological Sciences
• Course: BIO 102
• Professor: Cary Andrew

Document Summary

Effects of gravity/lack of buoyancy: bones, muscles for walking dispersal on land. Extraction of oxygen from atmosphere: lung, mouth, breathing. Archaeplastids (cid:862)old chloroplasts(cid:863): monophyletic group that includes red and green algae and land plants (separate kingdom) Plants evolved from algae: algae are not well adapted to life on land (typically live in moist environments) Biochemical markers: have chlorophyll a and b and a cell wall made of cellulose. Life cycle: series of changes in form that an organism undergoes, returning to the starting state. Ancestor of plants - green algae: the ancestor of land plants was a green alga viridaeplanta something like modern coleochaete that shares with land plants: alternation of generations, multicellular gametangium, 3-d parenchymatous growth. Land plants have haplodiplontic life cycle: have multicellular diploid and haploid phases to the life cycle called alternation of generations. Gametophyte: haploid multicellular phase that produces gametes. Algae typically produce gametes from a single cell gametangium.