Natural Selection

The differences among a species, like different bird beaks, are called

• genes.

• variations.

• traits.

• theories.

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How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

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A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:

• the green population to increase and the yellow to decrease

• both populations should stay the same

• both populations will increase

• the green population to decrease and the yellow to increaseThis is a wrong answer

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Survival of the Fittest and Evolution were proposed by what scientist?

• Charles Darwin

• Albert Einstein

• Steven Hawking

• Isaac Newton

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Natural Selection is driven by a change in the environment and survival of the

• Earth

• Fastest

• Fittest

• Biggest

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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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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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