Evolution Vocab

a process resulting in the evolution of organisms best adapted to the environment

• natural selection

• artificial selection

• evolution

• sexual selection

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selective breeding of plants and animals to promote the occurrence of desirable traits in offspring

• natural selection

• artificial selection

• prezygotic isolating mechanism

• founder effect

the change in a species over time

• gradualism

• natural selection

• derived trait

• evolution

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preventing reproduction by making fertilization unlikely

• allopatric speciation

• prezygotic isolating mechanism

• postzygotic isolating mechanism

operates after fertilization has occurred to ensure that the resulting hybrid remains infertile

• prezygotic isolating mechanism

• vestigial structure

• postzygotic isolating mechanism

• bottleneck

the formation of new species in populations that are geographically isolated from one another

• camouflage

• sympatric speciation

• adaptive radiation

• allopatric speciation

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the formation of new species in populations that live in the same geographic area

• sympatric speciation

• ancestral trait

• directional selection

• homologous structures

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similar structures that related species have inherited from a common ancestor

• ancestral trait

• vestigial structure

• homologous structure

• derived trait

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forming a very small remnant of something that was once much larger or more noticeable

• analogous structure

• vestigial structure

• homologous structure

• derived trait

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body parts that share a common function but not the structure

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