Natural Selection

How does waterproof feathers help penguins survive in the Antarctic. (Choose all that apply)

• Helps keep them warm and dry

• Helps them blend in

• Helps them swim in cold waters

• Helps them see further in cold weather

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Guppies are small fish that live in South American rivers. They can have different- sized spots on their bodies.

The river bottoms are covered in rocks. Guppies with spots that are the same size as the rocks on the bottom are harder for bigger fish to see and catch.

The diagram below shows a population of guppies that live in a river. At time 1, the population had the same number of guppies with small and large spots. At time 2, after many generations, there were many more guppies with small spots and fewer guppies with large spots in the population.

How did the environment change between time 1 and time 2? How did the population change?

• You cannot tell how the environment changed. With each generation, more guppies passed on the gene for small spots to their offspring.

• The rocks became smaller. With each generation, more guppies with small spots survived long enough to pass on the gene for small spots to their offspring.

• The rocks became smaller. Guppies with small spots are more likely to survive, so the guppies with large spots changed to have small spots.

• The rocks became smaller. Guppies with small spots are more likely to survive, so both kinds of guppies passed on the gene for small spots to their offspring.

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What is the process where animals live or die based on their adaptations to their environment.

• Genetic Drift

• Natural Selection

• The Circle of Life

• Mammoth

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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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A white moth living on a brown tree is an example of a(n).....

• adaptive trait

• non-adaptive trait

• trait

• moth in trouble

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Which word describes the word "variation"?

• Adaptations

• Differences

• Traits

• Genetics

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When an organism of a species has an adaptation, it will compete for resources better, survive longer and pass that adaptation on to it's offspring. This process is called

• evolution by natural selection
• artificial selection
• inbreeding
• outbreeding

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A variation is . . .

• when organisms have camouflage like spots or stripes

• an organism from a different dimension

• when you order different food than your friend

• differences between organisms in the same species

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Who was the naturalist that traveled the world to study plants and animals?

• Albert Einstein
• Charles Darwin
• Charles Barkley
• Isaac Newton

Do organisms "decide" to evolve and change?

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

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