BIOL 2004 Study Guide - Final Guide: Monosaccharide, Cell Envelope, Mycelium
19 Apr 2016
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No true sexual process cannot categorize species by sexual compatability/ability to reproduce with another individual: species is based on operational criteria. Differences between cultures at the 16s subunit for ribosomes. If >97% of amino acids at the subunit are the same, classify cultures as being same species. Only ~10,000 named species: much more genetic variation in one species than seen in animal, even though less total bacteria species than animal species. If same criteria for identifying bacterial species was used with animals, humans would be considered the same species as rats: must have a cultured population growing somewhere to identify as a species. Horizontal gene transfer: genetic information hops from one lineage to another. Traits end up being more mixed up in prokaryotic than eukaryotic lineages. Transfers can occur across closely related and distantly related lineages. Most bacteria are gram negative have an outer membrane and a plasma membrane. Gram positive have a cell envelope no outer membrane.
