BIOL 211 Lecture Notes - Lecture 2: Hygiene Hypothesis, Nucleoid, Health Professional
Document Summary
The # in a handful of fertile soil is greater than the number of people who have ever lived. Inhabit diverse habitats (to acidic, salty, cold, hot, etc) for more most organisms. Can be found in rocks 2 miles below earth"s surface. Two strains of e. coli are more different than a human and a duck-billed platypus. Prokaryotes ubiquitous and mediate interactions between abiotic materials and other organisms. Antibiotics target traits (not specified organisms) and their overuse has unintended consequences. Bacteria and archaea are both prokaryotes but are distinguished by: The types of molecules that make up their plasma membranes and cell walls. The machinery they use to transcribe dna and translate mrna into proteins. Can use o2 for respiration, but not required. Do not use oxygen but are not poisoned by it. Small genome (0. 001 as much dna as a eukaryote) Genome is a ring of dna (single strand) Plasmid (a second genome of dna), may include antibiotic-resistant genes.
