24.2 Natural Selection Quiz

10 Questions | Total Attempts: 68

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Personality Quizzes & Trivia

Natural selection was started by Charles Darwin where he said that species thrive where the environment favors them and die out where the environment is harsh and unsustainable for them. During the previous unit we studied the theory in depth. Check how well informed you are about the topic by taking the quiz below.


Questions and Answers
  • 1. 
    Organisms can express their adaptations during their generation.
    • A. 

      True

    • B. 

      False

  • 2. 
    __________ selection decreases genetic diversity because it only focuses on the average phenotype.
  • 3. 
    For a woman living in central Africa, which genotype would be the most advantageous to have?
    • A. 

      Homozygous for sickle cell allele

    • B. 

      Heterozygous for sickle cell allele

    • C. 

      Homozygous for normal hemoglobin allele

    • D. 

      Any genotype is advantageous

  • 4. 
    Which is NOT an example of natural selection?
    • A. 

      Plants with thorns are less likely to be eaten by herbivores than other members of the same species that lack thorns

    • B. 

      Plants with thorns are less likely to be eaten by herbivores than other members of the same species that lack thorns

    • C. 

      Plants with thorns are less likely to be eaten by herbivores than other members of the same species that lack thorns

    • D. 

      Fruit fly larvae with an enzyme to break down alcohol are better able to feed on fermenting fruit than those that lack the enzyme

    • E. 

      Fruit fly larvae with an enzyme to break down alcohol are better able to feed on fermenting fruit than those that lack the enzyme

  • 5. 
    What is the percent fitness of the recessive allele where:  AA = 10 Aa = 13 aa = 4 (2 Sig. Figs please!)
  • 6. 
    In the Trinidad guppies (Poecilia reticulata), natural selection may act differently in different locations of the waterfalls. Upstream of such waterfalls, guppies typically face only mild predation pressure from one small species of fish. Downstream of the waterfalls, however, populations of guppies are often under severe predation pressure from voracious predators such as the pike cichlid. What life history strategy would be favored by natural selection in the downstream waterfalls?
    • A. 

      Natural selection should now favor females that produce smaller offspring, since they wouldn't be eaten by predators

    • B. 

      Natural selection doesn't act differently on guppy populations in the high-predation and low-predation sites

    • C. 

      Natural selection favors females that can produce offspring that are relatively large and grow fast

    • D. 

      Natural selection favors females that produce as many offspring as possible, rather than producing larger and fewer offspring.

  • 7. 
    Adaptations are BEST described as
    • A. 

      Non-inherited traits that make organisms more fit in their environment

    • B. 

      Non-inherited traits that make organisms more fit in their environment through the process of natural selection

    • C. 

      Heritable traits that make organisms more fit in their environment through the process of natural selection

    • D. 

      All of the above

  • 8. 
    The introduction to DDT pesticide helped farmers eliminate bugs. However, bugs became resistant and eventually rendered the pesticide useless. Since we're not using DDT today, what might happen to bugs if we reintroduced DDT into the environment?
    • A. 

      They would die since the DDT-resistant gene isn't being expressed

    • B. 

      They would live since the DDT-resistant gene is still being expressed

  • 9. 
    The tendency for human infants to weigh 7 lbs at birth is an example of what kind of selection?
    • A. 

      Disruptive selection

    • B. 

      Stabilizing selection

    • C. 

      Directional selection

    • D. 

      Balancing selection

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