Biology 1001A Chapter Notes - Chapter 17: Calliphoridae, Pupa, Gradualism
Document Summary
Australian sheep blowflies occur throughout australia: considered pests: females deposit eggs in open wounds on livestock. Maggots eat flesh and damage wool: single female can produce hundreds of eggs, life cycle completed in 11-21 days. Controlling blowflies: bait traps, 5 kinds of chemical insecticides, organophosphate insecticides affect nervous system, rapidly killing adult flies and maggots, some australian sheep blowflies have mutation (natural selection) When sprayed with the chemical, resistant flies have enhanced fitness. Evolution is the main unifying concept in biology: explains how life on earth arose, species change over time in response to changes in their abiotic and biotic environment, begins with charles darwin and alfred wallace 1858. Biological evolution: refers to gradual change of populations or organisms over time, measuring time in generations rather than years: example: seems that blowfly populations evolved quickly, however generations are only 11-21 days" long.
