Speciation Review

An organism's ability to survive and reproduce in its environment refers to its

• Fitness
• Variation
• Selection
• Mutation

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Two once-related lizard populations are separated by a river they cannot cross. This is an example of which kind of reproductive barrier?

• isolation

• geography

• behavior

• timing

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Reproductive barriers are things that prevent species from

• finding resources

• living together

• breeding together

• fighting one another

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The process of how new species are formed is called

• adaptation

• survival of the fittest

• natural selection

• speciation

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Two firefly species have different light patterns to attract mates. One species' light will not attract another species to mate.

This is an example of what kind of barrier?

• timing

• behavior

• geography

• variation

Which of the following are types of reproductive barriers for speciation to occur?

• behavior

• geography

• selection pressure

• timing

Two species of squirrels are separated by the Grand Canyon. Speciation has occurred due to a _________ barrier

• timing

• geographic

• behavioral

• selective

Two species of tree live in the same field. One species reproduces in the spring and another reproduces in the winter. What is their reproductive barrier?

• geography

• behavioral

• timing

• speciation

A cactus has spines that protect it from herbivores. The spines are an example of a(n)

• variation

• selection pressure

• adaptation

• fitness

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A peacock has big, bright tail feathers to attract a mate. This selection pressure for this trait is

• adaptation

• predators

• reproductive success

• limited resources

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