BIO 121 Lecture Notes - Water Cycle, Stellar Atmosphere, Herbivore
Document Summary
Energy one-way flow: energy from sun goes through a one way flow chart, first trophic level: producers, plants, second trophic level: primary consumers, mouse, third trophic level: secondary consumers, snake, fourth trophic level: tertiary consumers, hawk, decomposers. Materials in ecosystems: cycle and recycle between organisms and the abiotic environment, sun goes one way, recycling will be used over and over again, energy flows one way through the system back out to the universe. Tree of life: all living things are related via common ancestry. Bacteria: bacteria include the vast majority of prokaryotes of which most people are aware, diverse nutritional types are scattered among the major groups of bacteria. Evolutionary origins of bacterial flagella: bacterial flagella are composed of a motor, hook and filament, many of the flagella"s proteins are modified versions of proteins that perform other tasks in bacteria.
