BIOL 120A Chapter 2: CHAPTER 2 DETAILED NOTES
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What are plant composed of: all plants are composed of cells. In some algae or fungi they are composed of singe cell but in angiosperms it can be composed of many different types of cells in sizes 10 to. There can be 254to 2540 cells in every inch of a plant. In 1665 englishman robert hooke looked at a cork under microscope and saw little nooks that resembled the cells in which the monks of monasteries slept and that where the name stuck to cells: cell theory. Recognizes the cell as basic unit of life. The theory state that all organisms are composed of cells and all cells arise from preexisting cells. Formed in early life, composed of polysaccharides and principally cellulose. Gives wood its strength and also saves attacks from pathogens: plasmodesmata. The cytoplasm consists of various organelles distributed in cystol. It also has a network of proteinaceous microtubules and microfilaments that make the cytoskeleton: membranes.
