Evolution Review KHS

If natural selection means "survival of the fittest", what does it mean to be "fit"?

• you can migrate to new areas

• you have a large territory

• you can reproduce and pass on your genes

• you have more genetic mutations

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How could a series of fossils show how a horse evolved over time?

• All the fossils would show varying levels of similar structures compared to modern horses.

• All the fossils would be found in the same place.

• All the fossils would be completely identical.

• All the fossils would be found in the same rock layer.

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Which is true about the Theory of Natural Selection?

• Not all organisms that are born survive to reproduce,

• Organisms compete with each other to survive.

• Variations exist among organisms.

• All of answers are true.

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Which is the best evidence for evolution?

• old rock layers contain fossils unlike existing organisms

• old rock layers contain fossils of complex organisms

• new rock layers contain fossils of simple organims

• new rock layers contain fossils unlike existing organisms

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What evidence supports the idea that whales and dolphins have a common ancestor?

• They eat the same food.

• They have similar anatomies.

• They swim the same way.

• They live in the same area of the ocean.

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What most likely causes variation in species?

• competition

• mutation

• changes during their lifetime

• predation

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Darwin's theory that species develop new traits and change over time is known as:

• natural selection

• adaptation

• speciation

• evolution

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If a cheetah is born with a mutation that makes it unable to run quickly, what will be the most important for it's survival?

• competition for social heirarchy

• competition for living space

• competition for prey and food

• competition for shelter

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What type of species has the best chance of survival through significant environmental change?

• genetically homogeneous (similar)

• genetically diverse

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A mutation changes the color of a grasshopper. What color grasshopper will have a genetic disadvantage?

• green grasshopper

• brown grasshopper

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