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?
(1 point)
Responses
variation
variation
fitness
fitness
selective pressure
selective pressure
food supply
selective pressure
natural selection
Changes in the environment can act only on existing variations in a population.
becomes more common in the population.
Define Natural Selection Quick Check
2 of 42 of 4 Items
Question
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?
(1 point)
Responses
selective pressures
selective pressures
fitness
fitness
natural selection
natural selection
mutation
Define Natural Selection Quick Check
3 of 43 of 4 Items
Question
What relationship exists between changes in the environment and variations?(1 point)
Responses
Changes in the environment cannot influence the fitness of an organism.
Changes in the environment cannot influence the fitness of an organism.
Changes in the environment can act only on existing variations in a population.
Changes in the environment can act only on existing variations in a population.
Changes in the environment can only cause new variations to appear.
Changes in the environment can only cause new variations to appear.
Changes in the environment cannot change which traits are advantageous.
Over time, the variation that gives an advantage(1 point)
Responses
becomes less common in the population.
becomes less common in the population.
can limit the number of selective pressures.
can limit the number of selective pressures.
can limit the number of individual organisms.
can limit the number of individual organisms.
becomes more common in the population.