Bio Test 3 (part 4)

11 Questions  I  By Ohchimonkey
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Biology Quizzes & Trivia
Bio test part 4 of 5. 55 question test.

  
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  • 1. 
    As the trees of England become less sooty due to pollution controls on factories, which of the following should occur?
    • A. 

      Fewer dark moths should survive.

    • B. 

      Numbers of dark and light moths won't change due to stabilizing selection.

    • C. 

      Genetic mutations will be reversed.

    • D. 

      More light-gray moths should survive.

    • E. 

      Fewer dark moths should survive, and more light-gray moths should survive.


  • 2. 
    An insect that exhibits resistance to a pesticide
    • A. 

      Developed the resistance in response to the pesticide.

    • B. 

      Mutated when exposed to the pesticide.

    • C. 

      Inherited genes that made it resistant to the pesticide.

    • D. 

      Provides an example of pest resurgence.

    • E. 

      None of these.


  • 3. 
    When DDT was first introduced, insects were very susceptible to it. The development of resistance to DDT by insects was the result of
    • A. 

      Special creation.

    • B. 

      Natural selection of forms that expressed genes for resistance.

    • C. 

      The high biotic potential of insects.

    • D. 

      A naturally occurring example of inheritance of acquired characteristics.

    • E. 

      Mutation induced by DDT.


  • 4. 
    Male mallards have had emerald green head feathers and wings with metallic blue patches for hundreds of years, whereas female mallards have been drab, brown-feathered ducks. This phenotypic situation suggests that mallards may be an example of
    • A. 

      Directional selection.

    • B. 

      Polyploidy.

    • C. 

      Allopatric speciation.

    • D. 

      Disruptive selection.

    • E. 

      Sexual isolation.


  • 5. 
    The difference in the appearance of the male and the female is known as
    • A. 

      Polymorphism.

    • B. 

      Sexual dimorphism.

    • C. 

      The dioecious condition.

    • D. 

      Sexual selection.

    • E. 

      A primary sexual characteristic.


  • 6. 
    Male northern sea lions are nearly twice the size of females because
    • A. 

      Males live longer than females.

    • B. 

      Predators of the sea lions favor males.

    • C. 

      Males compete to mate with females.

    • D. 

      Each male must protect the one female with which he mates.

    • E. 

      Males share in parenting the offspring.


  • 7. 
    For most species that exhibit sexual dimorphism the selection of a mate is the responsibility of the
    • A. 

      Male.

    • B. 

      Parents.

    • C. 

      Female.

    • D. 

      Larger individual, no matter the species.

    • E. 

      More colorful individual.


  • 8. 
    The influence of genetic drift on allele frequencies increases as
    • A. 

      Gene flow increases.

    • B. 

      Population size decreases.

    • C. 

      Mutation rate decreases.

    • D. 

      The number of heterozygous loci increases.

    • E. 

      Random mating increases.


  • 9. 
    Starlings were introduced into the US as a result of a small population being brought over centuries ago. Although there are now as many starlings in North America as there are in Europe, genetic variability in the North American population is reduced relative to that in Europe because
    • A. 

      There are more environments in Europe.

    • B. 

      The North American population is derived from a small founder population.

    • C. 

      There is more gene flow in Europe.

    • D. 

      There is less mutation in North America.

    • E. 

      There is less habitat fragmentation in Europe.


  • 10. 
    The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of
    • A. 

      Natural selection.

    • B. 

      Genetic isolation.

    • C. 

      The bottleneck effect.

    • D. 

      The founder principle.

    • E. 

      All of these


  • 11. 
    Gene flow
    • A. 

      Makes adjacent populations more similar.

    • B. 

      Acts to prevent speciation.

    • C. 

      Is a microevolutionary process.

    • D. 

      Counteracts the effects of mutation, natural selection, and genetic drift.

    • E. 

      All of these


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