Natural Selection

Process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest.

• Extinction
• Speciation
• Natural Selection
• Artificial Selection

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Natural selection explains HOW organisms change over time. What is the process in which populations are changed over time?

• Digestion

• Elimination

• Evolution

• Adaptation

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What word describes a trait that helps an organism survive in its environment?

• natural selection

• mutation

• camouflage

• adaptation

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Why is the mouse population changing over time? (You can enlarge the picture by placing your cursor on it.)

• The light mice can reproduce more successfully than the dark mice

• The hawks eat more dark mice than light mice because the dark mice taste better

• The hawks eat more light mice than dark mice because they can see the light mice more easily

• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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According to natural selection, light colored tree trunks would favor ___________________________.

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

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Why are advantageous (better fit) traits more likely to be passed onto offspring?

• They are more likely to survive and reproduce.

• They are more likely to die and not reproduce.

• They are able to reproduce more offspring.

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Predict which moth would increase in population over time.

• light colored

• dark colored

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What is the best claim for this image?

• The grey wolves are best adapted to the Arctic

• The brown rabbits are best adapted to the Arctic.

• The white rabbits are best adapted to the Arctic.

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If Easter eggs were living species of organisms, their different colors would be considered:

• Adaptations

• Variations

• Different species

• Extinct species

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Do organisms "decide" to evolve and change?

• Yes, they know they need to change to survive 
• No, they change because of natural selection