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Bats and birds eating insects at different times of day is an example of:
- resource partitioning.
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The change in populations of gray and red squirrels after the disease is an example of:
- natural selection.
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Based on Darwin’s ideas of descent with modification and natural selection, the observation that best supports the idea that increased competition causes changes in a species is:
- A population of deer show an increase in antler size over time, which allows them to obtain more mates during mating season.
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An example of an advantageous trait is:
- Elephants are being born without tusks, in response to pressures from poaching for ivory.
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A high rate of reproduction is beneficial to a species because:
- It ensures that at least a few individuals will survive to pass on their traits.
Bats and birds eating insects at different times of day is an example of(1 point)
Responses
resource partitioning.
resource partitioning.
survival of the fittest.
survival of the fittest.
competitive exclusion.
competitive exclusion.
natural selection.
Gray and red squirrels share the same habitat. Red squirrels usually eat hazelnuts. After a disease kills off hazelnut trees in their environment, they have to start eating acorns. Gray squirrels are well adapted to eating acorns. The number of red squirrels decreased over time because they were not well adapated to eating acorns. Gray squirrels gradually replaced the red squirrels because they are better adapted to the environment. This change in the populations is an example of(1 point)
Responses
genetic drift.
genetic drift.
natural selection.
natural selection.
competitive exclusion.
competitive exclusion.
resource partitioning.
Based on Darwin’s ideas of descent with modification and natural selection, which observation would best support the idea that increased competition causes changes in a species?(1 point)
Responses
A population of deer show an increase in antler size over time, which allows them to obtain more mates during mating season
A population of deer show an increase in antler size over time, which allows them to obtain more mates during mating season
A population of rattlesnake goes extinct as the water resources in their environment dry up during an extreme, prolonged drought
A population of rattlesnake goes extinct as the water resources in their environment dry up during an extreme, prolonged drought
A population of frogs develop greener skin after a hurricane blows away the white flowers in the environment
A population of frogs develop greener skin after a hurricane blows away the white flowers in the environment
A population of artic foxes develop a brown fur color as warmer temperatures reduce the number of days of snowfall in the area
A population of artic foxes develop a brown fur color as warmer temperatures reduce the number of days of snowfall in the areaWhat is an example of an advantageous trait?(1 point)
Responses
Peacocks are brightly colored to attract mates, though their feathers make them more susceptible to predation.
Peacocks are brightly colored to attract mates, though their feathers make them more susceptible to predation.
A large proportion of Ireland’s population has red hair, more than anywhere else in the world.
A large proportion of Ireland’s population has red hair, more than anywhere else in the world.
Black bears are not always black, but come in various shades including blonde, cinnamon, and brown.
Black bears are not always black, but come in various shades including blonde, cinnamon, and brown.
Elephants are being born without tusks, in response to pressures from poaching for ivory.
How is a high rate of reproduction beneficial to a species?(1 point)
Responses
It leads to faster evolution and passing on of traits.
It leads to faster evolution and passing on of traits.
It prevents extinction because there are so many individuals.
It prevents extinction because there are so many individuals.
It improves fitness over time versus species with slower rates of reproduction.
It improves fitness over time versus species with slower rates of reproduction.
It ensures that at least a few individuals will survive to pass on their traits.
It ensures that at least a few individuals will survive to pass on their traits.
1 answer