Bats and birds eating insects at different times of day is an example of(1 point)

Question

Responses

competitive exclusion.
competitive exclusion.

survival of the fittest.
survival of the fittest.

natural selection.
natural selection.

resource partitioning.

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.

resource partitioning.
resource partitioning.

competitive exclusion.

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 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 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 artic foxes develop a brown fur color as warmer temperatures reduce the number of days of snowfall in the area

What is an example of an advantageous trait?(1 point)
Responses

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.

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.

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.

Answer 1

Here are the correct responses based on the questions provided:

1. Bats and birds eating insects at different times of day is an example of:

   • Resource partitioning.

2. Gray and red squirrels share the same habitat. Red squirrels usually eat hazelnuts. After a disease kills off hazelnut trees, 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 adapted to eating acorns, and gray squirrels gradually replaced the red squirrels because they are better adapted to the environment. This change in the populations is an example of:

   • Natural selection.

3. 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?

   • A population of deer show an increase in antler size over time, which allows them to obtain more mates during mating season.

4. What is an example of an advantageous trait?

   • Elephants are being born without tusks, in response to pressures from poaching for ivory.

5. How is a high rate of reproduction beneficial to a species?

   • It ensures that at least a few individuals will survive to pass on their traits.

Let me know if you need further assistance!