EXST 2201 Chapter : Page 4
Document Summary
Nitrogen cycle: atmospheric nitrogen represents a large reservoir that is unavailable to most organisms. Phosphorous cycle: most biologically important form of phosphorous is phosphate, rocks contain a large reservoir of phosphorous that is unavailable to organisms. Food chain: all energy comes primarily from sunlight, and some from hydrothermic vents, energy is lost as you move up the food chain. Phylum ciliophora (paramecium: micro- and macro- nucleus, cilia for movement, cell wall, perpendicular grooves and cellulose plates. Phylum bacillariophyta (diatoms: lack of specific shape, very prominent nucleus, pseudopoda: false feet for capturing food and moving, multiple shapes and colors. Phylum foraminifera: chambers wound into a spiral. Phylum trypanosoma: sickle-shaped cells have flagella, round cells are blood cells. Division chlorophyta (green algae: unicellular, colonial, seedless, water required for reproduction, lives entire life in water, gametophyte & sporophyte indistinguishable, nonvascular. Division bryophyta: reproduce explosively by spores shed & dispersed by wind, water required for reproduction, predominantly gametophyte, nonvascular, don"t grow tall.
