1|P age
Ecology Final Exam Study Guide 2026-
2027: Comprehensive Questions, Answers &
Detailed Explanations
Tr
us
The coldest part of a large lake is usually in the zone.
a. benthic
b. littoral
te
c. pelagic
d. photic benthic
The primary difference between tundra and boreal forest is that
ds
a. the tundra generally lacks permafrost.
b. trees are the dominant vegetation in boreal forests but not
in tundra.
c. nearly all tundra areas are very dry, whereas boreal
ch
forests are wet. d. Both a and c trees are the dominant vegetation
in boreal forests but not in tundra.
ol
ar
Trustedscholar
, 2|P age
In which aquatic ecosystems are oxygen concentrations in the water
usually highest?
a. Rapidly running rivers
b. Deep lakes
c. Slowly running rivers
d. Deep oceans rapidly running rivers
On what time scale do Milankovitch cycles occur?
a. Less than a decade
b. On the order of a century
c. Between 20,000 and 200,000 years
d. More than a million years
Tr
Between 20,000 and 200,000 years
As one moves from the alpine to the subalpine to the montane
zone of a mountain, the mean temperature
us
a. consistently goes up.
b. first goes up and then goes down.
c. basically stays the same.
d. consistently goes down.
te
consistently goes up.
Which process can produce new combinations of alleles in a
ds
population?
a. founder effect
b. bottleneck effect
c. Genetic drift
ch
d. Recombination recombination
An ecologist studying ecosystems would be most interested in which
question?
a. Is a predator species maintaining species diversity by selectively
ol
preying on the most abundant prey species?
ar
Trustedscholar
, 3|P age
b. How much nitrogen is being taken up by organisms in a given
place?
c. How does temperature affect survivorship of marmots?
d. How do features of the landscape affect the movement of bears?
How much nitrogen is being taken up by organisms in a given place?
If the precipitation in Florida (largely temperate evergreen forest)
increased to an
average of 275 cm per year and the temperature warmed to
an average of 19°C, how would that change the landscape?
a. All of Florida would be covered in evergreen forests.
b. Part of Florida would transition to a mix of grasslands and
Tr
shrublands.
c. Florida would be covered in tropical seasonal forest with a small
area of tropical rainforest.
d. All of Florida would be covered in tropical rainforest.
us
All of Florida would be covered in tropical rainforest.
If the average temperature on Earth increased, what effect would
this have on the distribution of boreal forests in the Northern
te
Hemisphere?
a. Boreal forests would be able to grow further south than their
present range.
ds
b. The southern edge of the boreal forests would move northward.
c. The total global area covered by tundra would increase.
d. The distribution of boreal forests would not change.
ch
The southern edge of the boreal forests would move northward.
Which is the only process that can result in a brand new allele?
a. random assortment
b. mutation
ol
c. recombination
ar
Trustedscholar
, 4|P age
d. epistasis mutation
What factor is most important in minimizing the impacts of genetic
drift?
a. Mutation rate
b. Population size
c. Generation time of the organism
d. None of the above; the effects of genetic drift are constant across
all populations. population size
Which dominant species are characteristic of a temperate deciduous
forest?
a. birch, maple, oak, rhododendron
Tr
b. Frasier fir, spruce, loblolly pine
c. succulents
d. shrubs and grasses birch, maple, oak, rhododendron
us
In equatorial regions, the sun's rays strike Earth's surface at a more
angle
than they do toward the poles. This means that the same amount of
energy is spread over a(n) area in equatorial regions than in
te
polar regions. a. perpendicular; smaller
b. perpendicular; larger
c. acute (less than 90° angle); larger
ds
d. acute (less than 90° angle); smaller perpendicular; smaller
Which statement about atmospheric circulation patterns is false?
a. The condensation of water vapor into clouds is a warming
process.
ch
b. Cool air can hold more water vapor than warm air can.
c. Thunderclouds potentially reach only to the boundary between
the upper region of the troposphere and the bottom of the
ol
stratosphere.
ar
Trustedscholar
Ecology Final Exam Study Guide 2026-
2027: Comprehensive Questions, Answers &
Detailed Explanations
Tr
us
The coldest part of a large lake is usually in the zone.
a. benthic
b. littoral
te
c. pelagic
d. photic benthic
The primary difference between tundra and boreal forest is that
ds
a. the tundra generally lacks permafrost.
b. trees are the dominant vegetation in boreal forests but not
in tundra.
c. nearly all tundra areas are very dry, whereas boreal
ch
forests are wet. d. Both a and c trees are the dominant vegetation
in boreal forests but not in tundra.
ol
ar
Trustedscholar
, 2|P age
In which aquatic ecosystems are oxygen concentrations in the water
usually highest?
a. Rapidly running rivers
b. Deep lakes
c. Slowly running rivers
d. Deep oceans rapidly running rivers
On what time scale do Milankovitch cycles occur?
a. Less than a decade
b. On the order of a century
c. Between 20,000 and 200,000 years
d. More than a million years
Tr
Between 20,000 and 200,000 years
As one moves from the alpine to the subalpine to the montane
zone of a mountain, the mean temperature
us
a. consistently goes up.
b. first goes up and then goes down.
c. basically stays the same.
d. consistently goes down.
te
consistently goes up.
Which process can produce new combinations of alleles in a
ds
population?
a. founder effect
b. bottleneck effect
c. Genetic drift
ch
d. Recombination recombination
An ecologist studying ecosystems would be most interested in which
question?
a. Is a predator species maintaining species diversity by selectively
ol
preying on the most abundant prey species?
ar
Trustedscholar
, 3|P age
b. How much nitrogen is being taken up by organisms in a given
place?
c. How does temperature affect survivorship of marmots?
d. How do features of the landscape affect the movement of bears?
How much nitrogen is being taken up by organisms in a given place?
If the precipitation in Florida (largely temperate evergreen forest)
increased to an
average of 275 cm per year and the temperature warmed to
an average of 19°C, how would that change the landscape?
a. All of Florida would be covered in evergreen forests.
b. Part of Florida would transition to a mix of grasslands and
Tr
shrublands.
c. Florida would be covered in tropical seasonal forest with a small
area of tropical rainforest.
d. All of Florida would be covered in tropical rainforest.
us
All of Florida would be covered in tropical rainforest.
If the average temperature on Earth increased, what effect would
this have on the distribution of boreal forests in the Northern
te
Hemisphere?
a. Boreal forests would be able to grow further south than their
present range.
ds
b. The southern edge of the boreal forests would move northward.
c. The total global area covered by tundra would increase.
d. The distribution of boreal forests would not change.
ch
The southern edge of the boreal forests would move northward.
Which is the only process that can result in a brand new allele?
a. random assortment
b. mutation
ol
c. recombination
ar
Trustedscholar
, 4|P age
d. epistasis mutation
What factor is most important in minimizing the impacts of genetic
drift?
a. Mutation rate
b. Population size
c. Generation time of the organism
d. None of the above; the effects of genetic drift are constant across
all populations. population size
Which dominant species are characteristic of a temperate deciduous
forest?
a. birch, maple, oak, rhododendron
Tr
b. Frasier fir, spruce, loblolly pine
c. succulents
d. shrubs and grasses birch, maple, oak, rhododendron
us
In equatorial regions, the sun's rays strike Earth's surface at a more
angle
than they do toward the poles. This means that the same amount of
energy is spread over a(n) area in equatorial regions than in
te
polar regions. a. perpendicular; smaller
b. perpendicular; larger
c. acute (less than 90° angle); larger
ds
d. acute (less than 90° angle); smaller perpendicular; smaller
Which statement about atmospheric circulation patterns is false?
a. The condensation of water vapor into clouds is a warming
process.
ch
b. Cool air can hold more water vapor than warm air can.
c. Thunderclouds potentially reach only to the boundary between
the upper region of the troposphere and the bottom of the
ol
stratosphere.
ar
Trustedscholar
