Bacteria Cont. - Notes 11-3-11 Bacteria cont. Bacteria...

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Notes 11-3-11 Bacteria cont. Bacteria Spore? small resting stag of bacillus that can tolerate extreme conditions, con- tains a copy of the DNA and a small amount of cytoplasm some clump together and evolve pretty quickly - Bacterial conjugate plasmid: small circle DNA in cytoplasm; contains a few genes - a “fertility plasmid” may cause sex pillus (hair) to grow - sex pillus then pulls another bacterium close - a conjug- ate tube develops a copy of the gene passes through the tube o the other bacterium - plasmid may contain a gene for antibiotic resistance - the second bacterium now has resistance III.many bacteria are pathogens (cause diseases) Common bacterial diseases in humans: 1. food poisoning 2. tuberculosis 3. bacteria diarrhea 4. cholera 5. leprosy 6. tetanus 7. bubonic plaguue 8. STD’s IV. Baceria - useful things ex> 1. Food fermentation 2. Nitrogen cycling in the environment ** all nitrogen used by plants and animals passes through bacteria at some point! Remember the Rhizobium (N-fixing) bacteria
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Bacteria Cont. - Notes 11-3-11 Bacteria cont. Bacteria...

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