BYU BIO 100 Unit 3 Questions & Answers

BYU BIO 100 Unit 3 Questions & Answers Biological Evolution - Answer-A change in the genetic characteristics of a population of organisms over time genes and environmental pressures - Answer-evolutionary changes are inherited by populations (example: mites) - Answer-do populations or individuals evolve? natural selection - Answer-process by which traits become more or less common in a population due to consistent effects upon the survival and or reproduction of their forbearers microevolution (example: mosquitoes evolving resistance to DDT) - Answer-changes within a population of a species, easily observed and non-controversial Macroevolution (example: evolutionary corse of modern horses, whales and humans) - Answer-result of many microevolutionary changes over long periods of time resulting in a new species Theory - Answer-body of accepted general principles supported by many lines of evidence (fact) Evidence for Evolution - Answer-anatomical similarities, vestigal traits, development passage ways, DNA, biogeography, fossils Observations of Natural Selection - Answer-individuals w/in a pop vary, variation can be passed on, more offspring is produced than will survive, survival and reproduction are not random Fitness - Answer-relative survival and reproduction of one variant adaptation - Answer-traits that increase individual fitness artificial selection (example: flies and alcohol metabolism) - Answer-selection imposed by humans diversifying selection - Answer-s CONTINUES...