Biology, Evolution Review

The naturalist who proposed that evolution happens through natural selection was _____.

• Gregor Mendel

• John Muir

• Mrs. Holder

• Charles Darwin

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The process by which evolution occurs and in which certain genes make organisms more likely to survive and reproduce is called _______________.

• genetic change

• natural selection

• genetic resistance

• species separation

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Over time, a species may change behavior or physical appearance in response to changes in the environment. This _____ helps organisms to survive better in the environment.

• resistance

• adaptation

• genetic variation

• genetic change

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Adaptation is the result of _____.

• inheritable differences

• homeostasis

• inbreeding

• extinction

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In terms of evolution theory, which explains why giraffes have come to have such long necks?

• Giraffes prefer other giraffes that have long necks as their mates.

• Stretching to get food in high trees made their necks longer and this trait was passed to offspring.

• Giraffe food contains hormones that cause their vertebrae to lengthen

• Giraffes born with the longest necks stayed alive when food was scarce and passed this trait on to their offspring.

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Which explains why light-colored Himalayan rabbits can survive in the snowy mountains while dark-colored rabbits cannot?

• Predators can readily locate dark-colored rabbits in the snow but not light-colored rabbits.

• Light-colored rabbits absorb more heat and stay warmer in the winter than dark-colored rabbits.

• Dark-colored rabbits taste better than light-colored rabbits to the wolves that eat them.

• The light-colored Himalayan rabbit has no predators in the mountains.

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Plants that grow on the shaded forest floor often have larger leaves than plants that grow in an open field. How does this adaptation help the forest plants?

• Large leaves gather water for the plants.

• Large leaves gather sunlight for the plants.

• Large leaves attract insects to the plants.

• Large leaves keep the insects warm.

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A group of organisms that can mate with each other to produce offspring is known as a(n) _____.

• natural selection

• evolution

• adaptation

• species

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A spider may produce hundreds of eggs, only a few of which may survive. This is an example of _____.

• genetic change

• speciation

• overproduction

• division

Populations of all species are limited by _____.

• genetic change, speciation, adaptation, and separation

• starvation, disease, competition, and predation

• natural selection, evolution, and division

• breeding, selection, sediment, and ancestry

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