Unit 6 Test

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What is natural selection?

Back

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is genetic drift?

Back

Genetic drift is a random change in the frequency of alleles in a population over time, often having a more significant effect in small populations.

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What are nodes in a phylogenetic tree?

Back

Nodes are points on a phylogenetic tree where organisms share a common ancestor.

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What is convergent evolution?

Back

Convergent evolution occurs when different species develop similar traits independently, often due to similar environmental pressures.

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What is divergent evolution?

Back

Divergent evolution is the process by which two or more related species become more dissimilar over time, often due to different environmental pressures.

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What is punctuated equilibrium?

Back

Punctuated equilibrium is a theory in evolutionary biology that proposes that species remain relatively stable for long periods, interrupted by brief periods of rapid change.

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What is coevolution?

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Coevolution is the process by which two or more species influence each other's evolution, often seen in predator-prey relationships.

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What is the significance of DNA analysis in evolutionary biology?

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DNA analysis helps scientists determine genetic similarities and differences between species, providing evidence for common ancestry.

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What is the role of mutations in evolution?

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Mutations are changes in DNA that can introduce new genetic variation into a population, which can be acted upon by natural selection.

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What is gene flow?

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Gene flow is the transfer of genetic material between populations, which can increase genetic diversity.