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Theory of Evolution

QuestionAnswer
variation differences between individual members of a population
differences between individual members of a population organisms that can breed together & produce fertile offspring
variation differences between individual members of a population
adaptation any inherited trait that increases a population's chances of survival
niche the habitat and role a population plays in that habitat (prey, predator, space, light, moisture, etc.)
biodiversity the variety & abundance of species that make up a community
evolution change over time
natural selection 1.There is variation within a community. 2.Some variations are favorable. 3. Not all young produced in each generation can survive. 4. Individuals that survive & reproduce are those w/favorable variations.
homologous structures traits that are similar in different species because they have the same common ancestor
analogous structures traits that are similar in function but are not inherited from a common ancestor
vestigial structures traits that are inherited but reduced in size because of disuse
speciation the creation of new species
divergent evolution the process of species developing different traits because of differing environments
convergent evolution the process of species from different ancestors developing similar traits because of similar environments
gene pool all the genes possible in a population
all the genes possible in a population idea that states that if a population is not evolving genetic equilibrium will be reached and maintained
directional selection the shift of allele frequences toward an extreme phenotype
disruptive selection the shift of allele frequences that make it unfavorable to have the medium phenotype
coevolution the process of species that closely interact together developing structures that are well suited for each other
artificial selection selection by humans for breeding of useful traits from the natural variation among different organisms
adaptation inherited characteristic that increases an organism's chance of survival
natural selection process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
descent with modification principle that each living species has descended, with changes, from other species over time
principle that each living species has descended, with changes, from other species over time organ that serves no useful function in an organism
Created by: MahaylaCoomer
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