Gobetz Bio 150 Final Exam Correct 100%(RATED A+)

population - ANSWER an interbreeding (sharing genetic information) group of individuals who live in the same geographic area and exist at the same time variability within a species/population (importance) - ANSWER important because: -some genetic variations have advantages over others -natural selection can act on the variation that arises What if populations are separated and can't exchange genes? - ANSWER two processes can occur: 1. genetic divergence 2. speciation genetic divergence - ANSWER genetic differences accumulate between populations of a species... if it gets severe enough, the populations will not be able to breed, causing speciation -if 2 genetically divergent (but not speciated) populations begin to interbreed again, the result is offspring with more diverse genetic makeups Speciation - ANSWER -when the populations of a species diverge enough that they are not able to produce successful (viable and fertile) offspring decreasing variability within a species often leads to: - ANSWER instability bc one disease/bad event can lead to the whole population being wiped out -ex. crop monocultures (wheat)... if something happens, all wheat dies... no variation, so no resistance to said disease or event biodiversity - ANSWER the variability among different species -can be shown as species richness or species evenness -can be measured with the diversity index species richness - ANSWER the number of different species in an area species evenness - ANSWER relative abundance of each species in an area diversity index - ANSWER -A numerical measure for species diversity that is derived from both the number of species (species richness) and their proportional abundance (species evenness)