Evolutionary Theory (7abcdef - 12b)

7 Questions | Total Attempts: 314

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Evolutionary Theory (7abcdef - 12b)

2019.


Questions and Answers
  • 1. 
    This cladogram shows the evolutionary relationships among some mammals based on homologous structures. Which statement is supported by the cladogram?
    • A. 

      Hippopotamuses are more closely related to cows that to javelinas.

    • B. 

      Toothed whales are more closely related to mouse deer than to hippopotamuses.

    • C. 

      Javelinas and pigs are more closely related than baleen whales and toothed whales.

    • D. 

      Cows and mouse deer are more closely related that javelinas and pigs.

  • 2. 
    The data in the diagram is evidence that 
    • A. 

      A new species of horse suddenly appeared

    • B. 

      Horses slowly developed over time

    • C. 

      Horses have similar stages of rapid embryological development

    • D. 

      Horses have a common ancestry with other hooved animals

  • 3. 
    Male guppies found in areas without predators are more colorful thatn the ones found in locations with large predator populations.  A population of adult guppies orginating from an area with large number of predators is transferred to a nearby area with few predators. Which of these is most likely to happen over a few generations?
    • A. 

      The morality rate of the guppies will increase.

    • B. 

      Offspring will stop competing for resources.

    • C. 

      There will be an increase in mutations in the offspring.

    • D. 

      There will be an increase in the number of colorful guppies.

  • 4. 
    White-tailed deer are seasonal breeders.  Female white-tailed deer begin their reproductive cycle in the fall.  Rising testosterone levels in male white-tailed deer cause them to start their breeding season around the same time.  Offspring are born the following spring and summer. What is the most likely explanation for white-tailed deer having a seasonal breeding cycle instead of a monthly breeding cycle like many domesticated animals?
    • A. 

      Male and female deer come into contact with each other only in the fall.

    • B. 

      Large predators are not found in deer habitats during the spring and summer months

    • C. 

      Giving birth only in the spring and summer insures that offspring are born when food is most available. 

    • D. 

      Deer give birth in the spring and summer in order to avoid being pregnant during the hot summer months.

  • 5. 
    A new predator of rabbits has been introduced within an ecosystem.  This new predator runs faster than the native predators of rabbits. Which statement describes what will most likely occur in the rabbit population due to introduction of the predator?
    • A. 

      The rabbits will mutate their genes and express genes that increase their speed.

    • B. 

      Slower rabbits will develop stronger legs and pass this trait to their offspring.

    • C. 

      Rabbits will mate and produce offspring with a different species that has faster runners.

    • D. 

      Faster rabbits will survive and reproduce increasing the average speed of the rabbit.

  • 6. 
    The aye-aye lemur is a mammal that feeds mostly on insect larvae that live inside trees.  the aye-aye lemur has specialized middle finger that is long and thin.  the aye-aye lemur moves along a tree branch and taps the branch with its specialized finger.  When the aye-aye lemur hears a difference in the echo, it will tear open the bark with its teeth until the insect tunnel is exposed.  The aye-aye lemur than uses its specialized finger to reach in the insect larvae and remove it. Which selective pressure most likely resulted in the development of the aye-aye lemur's special adaptation?
    • A. 

      Limited availability of water

    • B. 

      Competing for mates

    • C. 

      Large numbers of natural predators

    • D. 

      Food sources that are hard to find

  • 7. 
    Conservation biologists studying cheetah populations have determined that the lack of genetic diversity among cheetahs is due to genetic drift. Which statement explains the most likely consequence of having a low genetic diversity on the cheetah population?
    • A. 

      The chances of a mutation occurring in the cheetah population are decreased, increasing the cheetah survival rate.

    • B. 

      The gene pool remains in equilibrium and future generations of cheetah offspring are stronger and better adapted to their environments.

    • C. 

      The cheetah population becomes less likely to survive an outbreak of a disease or an environmental change, increasing the chance of species extinction.

    • D. 

      Genetic variability is maintained from older cheetah populations that have survived and endured environmental stressors.

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