Biology Unit 7 Vocab Review - Evolution

a gradual change in a species over time

• evolution

• fossil

• biogeography

• convergent evolution

the changing of a species that results in its being better suited to its environment

• adaptation

• stabilizing selection

• genetic drift

• behavioral isolation

process of breeding organisms with specific traits in order to produce offspring with identical traits

• artificial selection

• genetic drift

• geographic isolation

• vestigial structure

mechanism for change in populations; occurs when organisms with favorable variations survive, reproduce, and pass the variations to the next generation

• natural selection

• reproductive isolation

• fossil

• analogous structure

natural selection that favors one of the extreme variations of a trait; can lead to rapid evolution in a population

• directional selection

• evolution

• genetic flow

• behavioral isolation

natural selection that favors average individuals in a population; results in a decline in population variation.

• stabilizing selection

• genetic drift

• geographic isolation

• biogeography

natural selection that favors individuals with either extreme of a trait; tends to eliminate intermediate phenotypes

• disruptive selection

• behavioral isolation

• analogous structure

• adaptation

any movement of genes from one population to another. If genes are carried to a population where those genes previously did not exist, gene flow can be a very important source of genetic variation.

• genetic flow

• geographic isolation

• vestigial structure

• artificial selection

change in gene pool in a population by chance events; results in disruption genetic equilibrium

• genetic drift

• fossil

• convergent evolution

• natural selection

a new species that occurs when members of similar populations no longer interbreed

• speciation

• biogeography

• divergent evolution

• directional selection