BIOL 1011 Lecture Notes - Cyanobacteria, Polysaccharide, Plasmogamy
3 Feb 2013
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Nicotine, caffine, thc and asprin among other drugs are secondary products produced by plants to defend from bugs, fungi, and nematodes importance of plants: clothing, energy, food, medicine ect. Plants split from red algae 1. 5 billion years ago: deep time is weird shit cyanobacteria were first plants to photosynthesize first bits of oxygen were used up by chemical processes in oxidization of iron. 2. 4 billion years ago cambrian explosion (oxygen revolution: another smaller one at 700 million years ago plants colonize land bout 500 million years ago. Plants use starch to store energy instead of sugar: sugar would be great but absorbs= water too easily chlorophyll b accessory protein. Presence of cellulose in the cell wall thylakoid (little stacks of pancakes: part of photosynthesis. Charophytes and land plants charophytes are the closest relatives of land plants: a type of green algea, cell division form cell plate in center of cell, plasmodesmata.
