BIOL 1011 Lecture Notes - Cork Cambium, Vascular Cambium, Non-Vascular Plant
5 Feb 2013
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Document Summary
Plants create substances, hashish, aspirin, morphine etc. as a secondary substance to protect itself from predators. Plants are important they create basis for life. Many organism do different things for its environment. Plants split from red algae 1500 million years ago. Photosynthesis invented by prokaryotes, cyanobacteria, creating a oxygen increase. Takes 1 billion years for atmospheric oxygen to begin, it was first absorbed by oceans etc. Colonization of land 500 million years ago. Oxygen started to build up in atmosphere which was fatal to some anaerobic plants. Plants don"t use pure sugar to store energy, sugar would uncontrollably absorb water. Features shared by all plants: 1) Amylopectin- glucose molecules different formation of glu"s. Broadens the spectrum of light that can be absorbed by the plant. (more than just chlorophyll a. Pancake stacks membranes: 2) charophytes are the closest relatives of land plants, they have a common ancestor. Makes cell plate in middle of cell.
