BIO SCI 1A Lecture Notes - Lecture 13: Staphylococcus, Neisseria Gonorrhoeae, Bloodborne
5 Mar 2016
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Document Summary
Most abundant life form up to 2. 5 million individual bacteria in 1 gram of fertile soil. Plasmids are separate from the chromosomal dna and can be easily transferred and replicated. Bacteria can obtain energy and carbon in a variety of ways. They reproduce through binary fission; their offspring is genetically identical to their parents. Creates large number of bacteria in a short period of time. Creates new genetic combinations which increases the ability of the bacteria to survive. (antibiotic resistance genes). Recycle dead organisms releasing their nutrients back to the environment (nutrient recycling). Bacteria fixes nitrogen into ammonia; allows plants to use it. Bacteria in the human gut aid digestion and produce vitamins. Bacteria on skin and in body openings help prevent infection by harmful organisms. Puts bacteria back into your gut (helps immune system) The use of organisms to clean up environmental pollution such as oil spills. Only a small portion of bacteria are pathogens.
