BIOL 102 Lecture Notes - Lecture 10: Mycosis, Choanoflagellate, Mycorrhiza
Document Summary
Organisms can be categorized by energy and carbon source. Carbon source: autotroph requires inorganic compounds (co2, heterotroph requires at least on organic nutrient (glucose) Examples: photoautotrophs (use sun and co2, photoheterotrophs (use sun and organic molecules, chemoautotrophs (use inorganic chemicals and inorganic, chemoheterotrophs (ingest/absorb organic molecules, mixotrophs combine photosynthesis and heterotrophy. Symbiosis ecological relationships in which two species live in close contact with on another. Can occur in three ways: mutualism both species beneit, commensalism one species beneits while other is not harmed, parasitism parasite eats the cell contents, tissues, or body luids of its host. Most are unicellular, although some form colonies. Circular c"some, dna not enclosed in nucleus. Most motile prokaryotes propel themselves by lagella. Many exhibit taxis, movement toward or away from a stimulus: positive towards beneicial stimuli, negative away from negative stimuli. Chemotaxis movement in response to chemicals. Phototaxis movement in response to light. Most abundant organism on earth, live almost everywhere.
