BIOG 1440 Lecture Notes - Lecture 9: Firmicutes, Metagenomics, Bacteroides
27 Feb 2017
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This is the last lecture included in prelim 1. (starting wed, the material will be for prelim 2) Prelim: 20 multiple choice and 5 short response. Just implies that organisms are in constant interaction mean that it is mutually beneficial. Commensalism - benefits symbiote, neutral for host. Parasitism - one benefits, but the other is worse off. Reside within the body or cells of an organism. Often obligate symbionts - have to be in the host to survive. Lynn margulis - eukaryotic cells could arise from symbiotic union of primitive prokaryotic cells. Symbiogenesis - mitochondria and chloroplasts evolved from bacteria engulfed by primitive cells then developed together. Rhizobacteria - depend on nutrients secreted by plant cells - help the plant to grow endosymbiotic - the gut lumen is not in the body. Plants cannot absorb n 2 , but can absorb no 3 . Most nitrogen comes from soil bacteria processing n 2.
