Bacterial Reproduction

Bacterial Reproduction - Endospores are a method of...

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Bacterial Reproduction Plasmids sometimes carry genes for resistance to antibiotics. Since they are also DNA, plasmids can be transferred between bacteria by any of the three processes mentioned above. Since genetic recombination does not routinely happen (as it does in sexually reproducing eukaryotes), mutation is the most important source of genetic variation for evolutionary change. Normally bacteria have short generation times, mutations are generated and distributed throughout bacterial populations more quickly than in eukaryotes. Prokaryotes have only a single chromosome, which makes them haploid. Consequently, mutations are not hidden by a dominant allele, and will be expressed and evaluated by natural selection more rapidly than in diploid eukaryotes.
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Unformatted text preview: Endospores are a method of survival, not one of reproduction. The formation of an endospore is shown in Figure 13. Certain bacteria will form a spore inside their cell membrane (an endospore) that allows them to wait out deteriorating environmental conditions. A small portion of cytoplasm and a chromosome copy are surrounded by three heavy, protective spore coats. The part of the bacterial cell outside the endospore deteriorates and the endospore is released. Endospores allow bacteria that produce them to survive in the harshest of environments. When conditions once again become suitable, the endospore absorbs water and grows out of its spore coat....
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