bio test ch 11

The evolution of hummingbirds’ beaks and plants with deep tubes in their flowers is an example of

• a) convergence.
• b) coevolution.
• c) speciation.
• d) radiation.

A tsunami has destroyed almost all of the palm trees in an area. This event will most likely lead to

• a) gene flow following disruptive selection.
• b) microevolution by reproductive isolation.
• c) genetic drift through bottleneck effect.
• d) speciation triggered by founder effect.

What does being in Hardy-Weinberg equilibrium mean for a population?

• a) The population is evolving very rapidly.
• b) The population is not evolving.
• c) Equilibrium would gradually end.
• d) Gene flow would occur, but slowly.

Which of the five factors that can lead to evolution would operate on a change in body color that enabled animals to better hide from predators?

• a) natural selection
• b) genetic drift
• c) sexual selection
• d) gene flow

To be in Hardy-Weinberg equilibrium, a population must be

• a) very small, have random mating, no gene flow, no mutations, no natural selection.
• b) very large, have random mating, high gene flow, many mutations, natural selection.
• c) small, have nonrandom mating, no gene flow, many mutations, no natural selection.
• d) very large, have random mating, no gene flow, no mutations, no natural selection.

What type of isolation occurs when the timing of reproduction is different between two populations?

• a) geographic
• b) temporal
• c) behavioral
• d) selective

The wings of robins and the wings of dragonflies are examples of

• a) divergent adaptation.
• b) convergent evolution.
• c) adaptive radiation.
• d) punctuated equilibrium.

Two species that are closely related become increasingly different through

• a) divergent evolution.
• b) disruptive selection.
• c) convergent isolation.
• d) competitive relationship

directional selection

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disruptive selection

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