Natural Selection (REVIEW)

What is a change in an organism that allows for it to survive in its environment?

• homologous
• vestigial
• variation
• adaptation

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What is natural selection?

• process in which helpful traits become more common over time

• a trait that helps an organism survive better

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A species could go extinct if:

• food becomes more plentiful.

• members of the species have adaptations to enhance survival.

• the environment changes drastically and no one can adapt.

• there is less competition for resources.

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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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How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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What is the advantage of having different shaped beaks?

• To look different from other species.
• To be able to eat the food readily available in the environment.
• To protect itself against predators.
• To protect itself against prey.

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Why is the mouse population changing over time?

• 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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Which organisms are most likely to survive?

• the best adapted
• the fastest
• the strongest
• the most domesticated (tamed)

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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

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Why are advantageous traits more likely to be passed onto offspring?

• Because they come from recessive alleles.

• Because the trait is an acquired phenotype.

• Because they come from dominant alleles.

• Because they are more likely to survive and reproduce

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