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The accompanying graph shows an association between the number of nests and male tail length in long-tailed widowbird. This represents an example of __________________.

Which trait would be considered a vestigial trait?

Which trait would be considered a vestigial trait?

Which steps show speciation in the correct order?

When most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that ________.

Punctuated speciation occurs quickly and then remains unchanged for long periods of time.

Caffeine exerts its action by _______ presynaptic adenosine receptors, which _______the amount of neurotransmitter released.

Genetic drift is the result of ________.

Under the biological species concept, what criterion is used to assign populations of organisms to the same biological species?

The _______ lobe is the most posterior portion of the cerebral cortex.