CT203 Lecture Notes - Lecture 5: Indigestion, Optical Microscope, Immunosuppression
Document Summary
The fossil record suggests that single-celled organism similar to today"s bacteria have existed for about 3,500,000,000 (billion) years. Grass cow ferments in stomach made to muscle mass eaten by humans. Great for fertilizer: bacteria in the roots of legumes fix nitrogen, bacteria are used in making cheese, etc, they contain both rna and dna, they possess the means for metabolism. Unlike viruses, most bacteria are capable of self-sustained existence. Some in oxygen-rich environments, others in oxygen-depleted environments: bacteria reproduce through simple binary fission; cell division can occur as rapidly as every 20 minutes, and as slowly as every two weeks. The rapid reproduction of bacteria allows for mutations to occur as. Some form spores that allow them to persist in hostile environmental conditions for generic information drifts from generation to generation extended periods of times eukaryotic well-nucleated . Bacteria are prokaryotic pre-nucleated while all other living organisms are: this is why they are relatively easy thing to treat.
