A) Bats and birds eating insects at different times of day is an example of (1 point)
competitive exclusion.
survival of the fittest.
resource partitioning.
natural selection.
C) resource partitioning.
A) Red squirrels usually eat hazelnuts, but due to a reduction in their food source, they had to
share resources with gray squirrels. The number of red squirrels decreased over time, and
gray squirrels gradually replaced the red squirrels because they are better adapted to the
environment. This is an example of (1 point)
survival of the fittest.
resource partitioning.
competitive exclusion.
natural selection
A) survival of the fittest.
A) 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)
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 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 deer show an increase in antler size over time, which allows them to obtain more mates during mating season.
A) What is an example of an advantageous trait? (1 point)
Peacocks are brightly colored to attract mates, though their feathers make them more
susceptible to predation.
Black bears are not always black, but come in various shades including blonde, cinnamon, and
brown.
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.
Peacocks are brightly colored to attract mates, though their feathers make them more susceptible to predation.
A) How is a high rate of reproduction beneficial to a species? (1 point)
It improves fitness over time versus species with slower rates of reproduction.
It leads to faster evolution and passing on of traits.
It prevents extinction because there are so many individuals.
It ensures that at least a few individuals will survive to pass on their traits.