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Consider the following scenario: You are a scientist observing rodents on the Galapagos Islands. You notice that the introducti...Question
Consider the following scenario:
You are a scientist observing rodents on the Galapagos Islands. You notice that the introduction of new bird of prey has limited the number of rodents.
What term best describes the factor that is limiting the number of rodents the environment can support?
A. selective pressure
B. fitness
C. variation
D. food supply
You are a scientist observing rodents on the Galapagos Islands. You notice that the introduction of new bird of prey has limited the number of rodents.
What term best describes the factor that is limiting the number of rodents the environment can support?
A. selective pressure
B. fitness
C. variation
D. food supply
Answers
Answer
Consider the following scenario:
In an aquatic bird population, some birds have long legs. Other birds have short legs. The food supply is minimal. The birds with long legs are able to wade farther into the water where they can find fish. Over time, the birds with long legs become more common.
What scientific term best describes this scenario?
A. selective pressures
B. mutation
C. fitness
D. natural selection
In an aquatic bird population, some birds have long legs. Other birds have short legs. The food supply is minimal. The birds with long legs are able to wade farther into the water where they can find fish. Over time, the birds with long legs become more common.
What scientific term best describes this scenario?
A. selective pressures
B. mutation
C. fitness
D. natural selection
Answer
What relationship exists between changes in the environment and variations?
A. Changes in the environment can act only on existing variations in a population.
B. Changes in the environment cannot change which traits are advantageous.
C. Changes in the environment can only cause new variations to appear.
D. Changes in the environment cannot influence the fitness of an organism.
A. Changes in the environment can act only on existing variations in a population.
B. Changes in the environment cannot change which traits are advantageous.
C. Changes in the environment can only cause new variations to appear.
D. Changes in the environment cannot influence the fitness of an organism.
Answer
Over time, the variation that gives an advantage
A. becomes less common in the population.
B. can limit the number of individual organisms.
C. can limit the number of selective pressures.
D. becomes more common in the population.
A. becomes less common in the population.
B. can limit the number of individual organisms.
C. can limit the number of selective pressures.
D. becomes more common in the population.