Environmental Biology Exam II Questions
and Answers with Verified Solutions | Latest
Updated 2026
What is the processes in evolution 1) Genetic variation within the population
in 2) Selective pressure
order, starting with the original 3) Differential reproductive success
population and ending with an 4) Change in allele frequencies in the
evolved population that has population
different over time
traits
,In a coral reef, small fish can hide D. The medium fish would be less likely to
from predators in the corals. Large survive.
fish are fast and can evade
predators
with speed. Medium fish cannot fit
in
the coral and are not as fast as the
large fish. In evolutionary terms,
what
would you expect to see in the
population over time?
A. The large fish would be
selected
against.
B. Only the medium fish would
survive.
C. The small fish would be less
likely
to survive.
D. The medium fish would be less
likely to survive.
,For natural selection to occur, B. Barn owls prey on field mice that are
there easier to
must be genetic diversity and see due to their light coloring.
selective pressure. Select all the C. A rise in average temperature increases
statements below that include the
examples of selective pressure. reproductive success of salmon that
A. Over many generations, the migrate earlier
percentage of darkly-colored in the spring.
pepper moths increases to 90%. D. A genetic mutation introduces albinism
B. Barn owls prey on field mice in a
that population of squirrels.
are easier to see due to their light
coloring.
C. A rise in average temperature
increases the reproductive
success
of salmon that migrate earlier in
the
spring.
D. A genetic mutation introduces
albinism in a population of
squirrels.
E. Low light conditions on a forest
floor favor plants with broad leaves
that can absorb more sunlight.
Why are endemic species Endemic species are typically isolated. If
especially they have
vulnerable to extinction when not coevolved with a particular species,
invasive species are introduced to they may
their ecosystems? not have the traits needed to coexist with
it.
What is the BOTTLENECK Event that causes sudden reductions in
EFFECT? population
, What is the FOUNDER EFFECT? A small subset of a population colonizes a
new
area
Is the following an example of a BOTTLENECK EFFECT
BOTTLENECK or FOUNDER
EFFECT?
An island volcano erupts, killing
80%
of the island's chameleon
population
in 30 days.
Is the following an example of a FOUNDER EFFECT
BOTTLENECK or FOUNDER
EFFECT?
European settlers brings a
colonizing
population of mice on their ships to
a
new ecosystem.
Is the following an example of a FOUNDER EFFECT
BOTTLENECK or FOUNDER
EFFECT?
A hurricane blows a few hundred
butterflies from the mainland to a
nearby island.
and Answers with Verified Solutions | Latest
Updated 2026
What is the processes in evolution 1) Genetic variation within the population
in 2) Selective pressure
order, starting with the original 3) Differential reproductive success
population and ending with an 4) Change in allele frequencies in the
evolved population that has population
different over time
traits
,In a coral reef, small fish can hide D. The medium fish would be less likely to
from predators in the corals. Large survive.
fish are fast and can evade
predators
with speed. Medium fish cannot fit
in
the coral and are not as fast as the
large fish. In evolutionary terms,
what
would you expect to see in the
population over time?
A. The large fish would be
selected
against.
B. Only the medium fish would
survive.
C. The small fish would be less
likely
to survive.
D. The medium fish would be less
likely to survive.
,For natural selection to occur, B. Barn owls prey on field mice that are
there easier to
must be genetic diversity and see due to their light coloring.
selective pressure. Select all the C. A rise in average temperature increases
statements below that include the
examples of selective pressure. reproductive success of salmon that
A. Over many generations, the migrate earlier
percentage of darkly-colored in the spring.
pepper moths increases to 90%. D. A genetic mutation introduces albinism
B. Barn owls prey on field mice in a
that population of squirrels.
are easier to see due to their light
coloring.
C. A rise in average temperature
increases the reproductive
success
of salmon that migrate earlier in
the
spring.
D. A genetic mutation introduces
albinism in a population of
squirrels.
E. Low light conditions on a forest
floor favor plants with broad leaves
that can absorb more sunlight.
Why are endemic species Endemic species are typically isolated. If
especially they have
vulnerable to extinction when not coevolved with a particular species,
invasive species are introduced to they may
their ecosystems? not have the traits needed to coexist with
it.
What is the BOTTLENECK Event that causes sudden reductions in
EFFECT? population
, What is the FOUNDER EFFECT? A small subset of a population colonizes a
new
area
Is the following an example of a BOTTLENECK EFFECT
BOTTLENECK or FOUNDER
EFFECT?
An island volcano erupts, killing
80%
of the island's chameleon
population
in 30 days.
Is the following an example of a FOUNDER EFFECT
BOTTLENECK or FOUNDER
EFFECT?
European settlers brings a
colonizing
population of mice on their ships to
a
new ecosystem.
Is the following an example of a FOUNDER EFFECT
BOTTLENECK or FOUNDER
EFFECT?
A hurricane blows a few hundred
butterflies from the mainland to a
nearby island.
