Evolution Review Sheet

A possible explanation for why some organisms survived and others did not is that some were

• herbivores that had a large variety of plants to eat
• able to evolve quickly into better adapted non-avian species
• better able to compete successfully after the asteroid impact
• faster and stronger than others and were able to outrun the blast of the impact

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What role does the potential for a species to increase in number play in evolution?

• It drives natural selection and adaptation, influencing evolutionary processes.
• It has no impact on species survival or change.
• It solely determines the physical traits of organisms.
• It limits genetic diversity and hinders evolution.

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How does heritable genetic variation contribute to evolutionary processes?

• Heritable genetic variation enables natural selection, driving adaptation and evolution.
• Heritable genetic variation prevents adaptation, stalling evolutionary change.
• Heritable genetic variation causes uniformity, limiting species diversity.
• Heritable genetic variation leads to genetic drift, hindering evolution.

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Why is competition for resources important in the process of evolution?

• Competition for resources is important because it leads to natural selection, which drives evolution.
• Resource abundance eliminates the need for natural selection.
• Competition for resources hinders adaptation and slows evolution.
• Competition for resources has no impact on species survival.

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What is the significance of the proliferation of better-adapted organisms in evolution?

• It reduces competition among species in ecosystems.
• It limits genetic variation and species survival.
• It promotes uniformity and stagnation in evolution.
• It enhances biodiversity and adaptability of species through natural selection.

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How do mutations contribute to genetic variation?

• Mutations have no effect on genetic diversity in populations.
• Mutations only occur in non-heritable traits and do not affect genetics.
• Mutations are always harmful and reduce genetic variation.
• Mutations introduce new genetic variations by altering DNA sequences, which can be inherited and contribute to diversity in a population.

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What impact does sexual reproduction have on genetic variation?

• Sexual reproduction decreases genetic variation.
• Sexual reproduction has no effect on genetic variation.
• Sexual reproduction eliminates genetic variation.
• Sexual reproduction increases genetic variation.

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How can mathematical models be used to understand the process of evolution?

• Mathematical models help simulate and predict evolutionary processes by representing genetic variation, natural selection, and population dynamics.
• Mathematical models focus solely on environmental factors, ignoring genetic aspects.
• Mathematical models are used to create artistic representations of evolution.
• Mathematical models can only describe physical phenomena, not biological processes.

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What is the relationship between survival, reproduction, and adaptation in evolution?

• Reproduction is independent of survival and adaptation.
• Survival leads to reproduction, and adaptation enhances both, driving evolution.
• Adaptation occurs only after reproduction takes place.
• Survival and reproduction do not influence evolution directly.

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Why might not all offspring survive in a given environment?

• Limited resources, predation, disease, and competition can prevent all offspring from surviving.
• Offspring thrive regardless of their surroundings.
• Environmental factors have no impact on survival.
• All offspring are guaranteed to survive.

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