Natural Selection and Genetic Drift

What was the variation in the Peppered Moth that affected their survival?

• Size

• Aggressiveness

• Color

• Species

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Before the industrial revolution the birds were eating more black moths. After the industrial revolution the birds started eating more white moths. Why

• The birds thought the white moths tasted better.

• There were not any black moths to eat

• The white moths stood out on the dark trees so the birds could see them easier.

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Genetic drift occurs most quickly in -

• small populations.

• populations with large genetic variation.

• populations with small genetic variation.

• large populations.

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A forest fire ignites in the Chattahoochee National Forest and kills many members of a population of pigmy rattlesnakes. What is this an example of?

• Natural Selection

• Genetic Drift

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Warrior ants, which live in Africa, can produce a chemical that mimics the chemicals produced by other species of ants. This keeps the other ants from attacking the warrior ants. What is this an example of?

• Natural Selection

• Genetic Drift

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A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population. What is this an example of?

• Genetic Drift

• Natural Selection

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During a hurricane, a population of beetles almost gets completely wiped out. The only beetles that survived were lucky that they were in their nest at the time of the hurricane and had enough food to survive.

• Natural selection

• Genetic Drift

• Gene Flow

• Non-Random Mating

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Insects become resistant to pesticides very quickly, sometime in one generation. If an insect is resistant to the chemical, most of the offspring will also be resistant. Considering that insect generations can be a matter of weeks, insects in an area can become immune to a chemical within months.

• Mutation

• Natural Selection

• Genetic Drift

• Gene Flow

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A certain type of plant can produce blue or yellow flowers. During a fire, many yellow flowers are destroyed and now since blue is the dominant trait, the plant reproduces offspring that produce only blue flowers.

• Non-Random Mating

• Gene Flow

• Mutation

• Genetic Drift

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This is one of the mechanisms of evolution; it is a continuous process in which organisms with traits that make them better-adapted to their environment are more likely to survive and reproduce than organisms without such adaptations

• Directional selection

• Microevolution

• Gene flow / genetic drift

• Natural selection

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