Evolution Natural Selection and Adaptations

What main characteristic of finches did Darwin study?

• a. Feathers

• b. Coloration

• c. Beak shape

• d. Wing shape

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The theory of evolution by natural selection states...

• a. Organisms better suited for their environment are likely to become extinct

• b. Organisms change into completely new organisms

• c. Organisms have a better chance of survival if they migrate and hibernate

• d. Organisms better suited for their environment are more likely to survive and reproduce

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The adaptation in some fish of increased gill surface area has allowed...

• them to be better swimmers

• them to absorb the oxygen in the water more efficiently

• them to reproduce easier

• them to better camouflage

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Many birds, such as the barn swallow, have hollow bones, while a few birds, such as the ostrich, have solid bones. Which best explains this adaptation that are seen in birds?

• Hollow bones allow for a lighter body weight for flight.

• Hollow bones allow for more space for making more red blood cells

• Larger birds need solid bones to hold the weight when standing.

• Solid bones are an advantage because hollow bones are too brittle..

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Which of the following is NOT an adaptation that allows a polar bear to survive in its environment?

• Thick layer of fat and fur

• A herbivorous diet

• Large paws for traction in snow and ice

• White fur for camouflage

Which of the following is NOT an adaptation that allows a cactus to survive in the desert?

• Its green color

• Spines for protection

• Large stems for water storage

• Wide root systems

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Which of the following terms describes a characteristic that helps an organism survive and reproduce?

• a. Variation

• b. Evolution

• c. Mutation

• d. Adaptation

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Which of the following adaptations helps birds fly?

• They have more fat than most animals, so they can fly for long distances.

• They have hollow bones, so they are lighter.

• They have smaller blood vessels, so their hearts have to work less in flight.

• They have a larger stomach, so they can absorb food faster.

A puppy has a pattern of spots on its fur that is similar to that of its parents. Where are the instructions stored that provide information for a puppy’s fur pattern?

• In the mitochondria

• In cytoplasm inside cells

• On genes within chromosomes

• On the cell membrane

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How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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