🧬 Evolution and Natural Selection

🧬 Biology & Health · Quiz 004

Explain how heritable variation, differential reproductive success, common ancestry, and reproductive isolation contribute to evolutionary change.

Learning goalExplain how heritable variation, differential reproductive success, common ancestry, and reproductive isolation contribute to evolutionary change.

  • 5 questions
  • Foundation
  • Explanations after finishing
Answered 0/5
FoundationIn a wild population without deliberate human breeding, which process can cause heritable traits associated with greater reproductive success in a particular environment to become more common across generations?
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Look for the evolutionary process driven by differences in reproductive success among heritable variants.

UnderstandingWhy is heritable genetic variation important for evolution by natural selection?
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Natural selection requires individuals to differ in ways that can be passed to descendants.

ApplicationA population of insects contains heritable variation in resistance to a pesticide. After repeated pesticide exposure, resistant insects leave more offspring than susceptible insects. Over generations, resistance becomes more common. Which process best explains the change?
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Identify the combination of heritable variation and unequal reproductive success.

InterpretationThe forelimbs of humans, bats, whales, and other mammals have different functions but share a similar underlying bone arrangement. What is the strongest evolutionary interpretation of this pattern?
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Shared structural organization can carry evidence of ancestry even when present-day functions differ.

ConnectionTwo populations of the same ancestral species become geographically isolated. Over many generations they diverge genetically, and when contact is restored they no longer produce fertile offspring together. Which evolutionary outcome has occurred?
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Focus on the long-term result of divergence that creates reproductive isolation.

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