Unit 4 Review: Speciation & Extinction

What role do mutations play in the process of speciation?

• They eliminate genetic diversity

• They introduce new genetic variations

• They prevent species from adapting

• They always lead to extinction

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How can high genetic variability within a population impact its ability to survive environmental changes?

• It makes the population more vulnerable to diseases

• It decreases the population's adaptability

• It increases the likelihood of survival and adaptation

• It reduces the chances of new mutations

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How do speciation and extinction interact to shape biological diversity?

• Speciation decreases biological diversity

• Extinction prevents new species from forming

• Speciation and extinction both contribute to the balance of ecosystems

• Extinction always leads to a decrease in diversity

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Why is genetic variability important to the health of populations and preventing extinction?

• It ensures that all individuals are identical

• It reduces the chances of disease spreading

• It allows populations to adapt to changing environments

• It limits the potential for evolution

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What factors contribute to extinction, and how do these factors impact biological diversity?

• Overpopulation increases diversity

• Habitat destruction decreases diversity

• Disease outbreaks increase genetic diversity

• Climate stability leads to more extinctions

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