BIOL 205 Lecture Notes - Lecture 1: Snow Goose, Microevolution, Penicillin
Document Summary
Penicillin fought the fatal infection of staphylococcus aureus. Pencillin was 1st antibiotic drug based on a naturally occurring substance that kills bacteria, described as a wonder drug. Pencillin was first a military secret and then the disaster at cacoanut grove (fire killing 400ppl) it became public. 1945 fleming (scientist to discover penicillin) predicted some bacteria could low doses and the offspring of those would be resistant to it. In 1946 - 14% of the staphylococcus strains were resistant and 1950 was. Streptococcus pneumonia is leading cause of infectious death worldwide (12,000ppl/year) Darwin saw that natural selection can change the pattern of variation in a the same place and time population. Variation in natural populations heritable change in the genetics of a population: to study microevolution you would analyze variation (difference. When we choose antibiotics we are selecting the success of organisms that between individuals) in natural populations and determine why these were inherited.
