Evolution and Natural Selection

What is one way genetic variation contributes to evolution by natural selection?

• It decreases the chances of survival for a species.

• It provides different traits that may be advantageous in changing environments.

• It ensures all individuals in a species are identical.

• It prevents any changes in a species over time.

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How do environmental factors influence the process of natural selection?

• They have no impact on natural selection.

• They create new species instantly.

• They determine which traits are advantageous for survival.

• They eliminate all genetic variation.

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What is a possible outcome for a species that cannot adapt to environmental changes?

• The species will thrive and increase in number.

• The species may become extinct.

• The species will develop new traits overnight.

• The species will remain unchanged indefinitely.

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Which of the following best describes genetic variation?

• It is the process by which organisms become extinct.

• It is the difference in DNA among individuals within a species.

• It is the similarity in traits among all species.

• It is the process of environmental change.

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Why is genetic variation important for the survival of a species?

• It ensures that all individuals are identical.

• It allows for adaptation to changing environments.

• It prevents any changes in the species.

• It reduces the chances of survival.

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What role do environmental factors play in the diversity of organisms?

• They have no role in diversity.

• They create identical organisms.

• They influence which traits are beneficial, leading to diversity.

• They eliminate all diversity.

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Which of the following is an example of a genetic variation?

• All birds having the same beak size.

• Different fur colors in a population of rabbits.

• Identical leaf shapes in all trees.

• Uniform height in a population of humans.

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How can a species' inability to adapt lead to its extinction?

• By increasing its population size.

• By making it more competitive.

• By reducing its ability to survive in changing environments.

• By ensuring it thrives in all conditions.

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What is natural selection?

• A process where all organisms become identical.

• A process where organisms with advantageous traits survive and reproduce.

• A process that eliminates all genetic variation.

• A process that prevents any changes in species.

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Which factor is NOT a contributor to evolution by natural selection?

• Genetic variation.

• Environmental changes.

• Identical traits in all individuals.

• Competition for resources.

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