Multiple choice

Which of the following best describes evolution?

  1. Cumulative change in heritable characterics of a population

  2. Cumulative change in heritable characterics of a species

  3. Cumulative change in observable characterics of a population

  4. Cumulative change in observable characterics of a species
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A Correct answer
Explanation

Evolution is formally defined as the cumulative change in the heritable characteristics of a population over time. It must be heritable (genetic) rather than just observable (which could be environmental), and it occurs at the population level.

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