AP Bio Unit 9 Evolution and Natural Selection Review

______________ was a naturalist who presented natural selection as a driving force behind evolution.

• Gregor Mendel

• Louis Pasteur

• Charles Darwin

• Shah Rukh Khan

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Which of the following conditions can influence the rate at which evolution takes place?

• genetic drift

• nonrandom mating

• migration

• All of the above

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Gene flow describes the ________.

• movement of genes from one generation to the next

• movement of genes from one population to another

• exchange of genes during recombination

• movement of genes within a population because of interbreeding

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Selection that splits a population into two groups

• directional selection

• disruptive selection

• polygenic selection

• stabilizing selection

Speciation can occur as a result of geographic isolation because _________.

• members of a species can no longer find mates

• populations that live in different environments may be exposed to different selection pressures

• exchange of genes during recombination

• movement of genes within a population because of interbreeding

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The hypothesis that evolution occurs at a slow, constant rate is known as ______.

• gradualism

• slow motion

• natural selection

• adaptation

Speciation that occurs over relatively short periods of time, followed by long periods of little or no change ___.

• directional evolution

• directional equilibrium

• punctuated equilibrium

• punctuated evolution

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_______________ occurs when a population declines to a very small number then goes back up but results in a permanent loss of genetic diversity in the population (example: the Cheetah population)

• coevolution

• bottleneck

• archaeopteryz

• mutation

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The reduced functionless hind leg bones in some whale species and the wings of the flightless bird called the Kiwi are

both an example of _____________________.

• vestigial structure

• bottleneck

• allopatric speciation

• genetic drift

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What type of structures are shown?

• Homologous

• Analogous

• Vestigial

• Heterologous

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