Unit 2 Test Review: Natural & Artificial Selection

Which of the following is a condition for a trait to become more common over time in a population? Check all that apply.

• there must be a genetic variation of the trait in the population

• The trait must give individuals an advantage in producing offspring that survive.

• The trait must be better suited for the environment.

• The trait must be inheritable.

• The trait must be the result of an immediate change in the environment.

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What is a genetic characteristic that allows an organism to survive and reproduce?

• Population

• Generation

• Adaptation

• Predominance

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A characteristic or quality of an organism that is genetically inherited from one generation to the next is known as –

• A variation

• A gene

• A trait

• A mutation

The process where organisms best fit for the environment are more likely to survive and reproduce.

• Artificial selection

• Natural Selection

• Population

• Variation

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Two or more of a species that live in the same habitat.

• Natural Selection

• Artificial Selection

• Population

• Variation

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The process through which humans breed animals and plants for desired traits.

• Natural Selection

• Artificial Selection

• Population

• Variation

The different phenotypes among a species, such as the size of a bird's beak.

• Natural Selection

• Artificial Selection

• Population

• Variation

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All rabbits living in a particular area would be an example of a(n):

• Population

• Species

• Individual

• Adaptation

The differences among a species, like large and small bird beaks, are called:

• Species

• Breeds

• Variations

• Favorable traits

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Leopard seals are animals adapted to survive in the freezing conditions of Antarctica. Individual seals vary in their different traits, such as the number of spots on their coats, the thickness of their layer of blubber, and the shape of their heads. Which one of these traits would have the greatest impact of a leopard seal surviving in a cold environment?

• number of teeth

• thickness of their blubber layer

• shape of their head

• number of spots on their coats

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