Evolution Review

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 most likely causes variation in species?

• competition

• mutation

• changes during their lifetime

• predation

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What can be determined by similarities in the forearms of humans and dogs?

• They are the same species.

• Dogs evolved from humans.

• Birds evolved from humans.

• Humans and dogs share a common ancestor.

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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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Why did mammals become dominant after the mass extinction of dinosaurs?

• They were larger than dinosaurs and ate different food.

• They were able to hibernate for hundreds of year.

• They lived in different areas of Earth than dinosaurs.

• They had traits that helped them adapt to environmental changes.

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During a freeze, most strawberry plants die. Why would some strawberry plants survive?

• The color of the strawberry helps maintain it's temperature.

• Some have larger leaves that protect the fruit.

• Some have genetic variations that cause them to be resistant to the cold.

• Some are able to reproduce more quickly than others.

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Why would a fox have a fur coat that turns white in the winter and brown in the summer?

• The foxes genes helped the foxes ancestors survive and reproduce.

• The fox inherited genes for white fur from its mother and genes for brown fur from its father.

• The foxes parents learned how to change their fur color and passed the trait to their offspring.

• The fox eats food in the summer that changes the fur color.

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