BIOLOGY 2EE3- Midterm Exam Guide - Comprehensive Notes for the exam ( 44 pages long!)

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Midterm - feb 28th 7pm ; 2:1 mc: sa. Viruses infect the three domains bacteria, archaea and eukarya. 3 domains, know distinguishing features of the three domains of organisms. Root nodules on plants bacteria reduce nitrogen gas to ammonia and providing plant with reduced nitrogen nitrogen fixation - enhances nitrogen in the soil. Top left: sludge process with oxygen pumped into system. Anaerobic bacteria break down cellulose with ciliated protozoa. If we don"t get sufficient b12 we become anemic bc enzymes like methionine synthase require it. Bacteria are the only ones that use this vitamin (produce it). Spontaneous generation hypothesis - microbes could spontaneously generate. Boil broth to sterilize + kill all bacteria. Cool the broth - broth remained sterile and wouldn"t go pewter for long periods bc boiling removes most organisms. Let broth into swan neck and leave it there It goes pewter bc some organisms inoculate the broth and grow.

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