ENGL 2201 Chapter : Beowulf
Document Summary
12 homework: list the three major domains of life and the five kingdoms of organisms. Describe the fundamental criteria used in assigning organisms to these divisions. Bacteria are simple life forms with cells lacking a nucleus (purple, green, cyanobacteria/blue-green), Archaea are simple and microscopic including methane producers and sulfur oxidizers in deep sea vents, and at extreme temps/pressures, eukarya are complex orgs, multicellular plants, animals, fungi. Plankton include all organisms: algae, animals and bacteria that drift with ocean currents, individual form called plankter, can swim, weakly, vertically. Nekton are all animals capable of moving independently of the ocean currents by swimming or other means of propulsion, can migrate/swim, include fish, squid, mammals, humans when swimming. Benthos describes organisms living on or in the ocean bottom, epifauna live on the surface of the sea floor, either attracted to rocks or moving along the bottom, infauna live buried in sand, shells/mud. Plankton do make up most of earth"s biomass, 98%
