BIO 124 Chapter Notes - Chapter 26: Green Algae, Vascular Tissue, Charophyta
16 Mar 2016
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Plants and animals aren"t closely related but they both appeared before animals and are vital to their survival. Plants supply o2 and food for animals & fungi are decomposers and recycle nutrients. Fossils show plants colonized land about 470 ma: green algae is plants closest ancestor. Plants and algae share traits like mulicellularity, eukaryotes, phototrophs. Plants, green algae, brown algae, dinolagellates have cellulose cell walls and chloroplasts with chlorophylls a&b. But charophytes (green algae) are closest living relaive to plants. They have circular proteins that synthesize cellulose, have similar lagellated sperm. Adaptaions for plants to move to land o. When charophytes got dragged towards shallow waters, natural selecion favored those that could survive. Plants have sporopollenin (layer of polymer that protects zygote) - is similar to what"s found in plants today o o. When they got to land, there was more sunlight, more co2, more mineral nutrients.
