Cumulative Exam — Cumulative exam Answers

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1
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Deciduous forests receive most of their 30 to 60 inches of annual precipitation in the summer.

A
T
B
F
2
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Which of the following is not a characteristic of the rainforest biome?

A
high year-round rainfall
B
consistent year-round temperatures
C
wide diversity of plant and animal species
D
always found along coasts
3

Which of the following is principally responsible for water cycling in plants?

A
evaporation
B
transpiration
C
evapotranspiration
D
condensation
4

How is water transferred from the air to the ground?

A
transpiration
B
precipitation
C
evaporation
D
all of the above
5

Because of their small supplies of water, deserts are not a crucial biome on Earth.

A
T
B
F
6

Mammals do not live in the tundra, because the climate is too extreme.

A
T
B
F
7

Which of the following statements about biodiversity is not true?

A
Changes to biodiversity never occur naturally.
B
Changes to biodiversity can lead to a decrease in ecosystem stability.
C
Changes to biodiversity can positively and negatively affect on an ecosystem.
D
Changes to biodiversity can lead to an increase in ecosystem stability.
8

Mammals were not contemporaries of the dinosaurs.

A
T
B
F
9

A species that has experienced a severe bottleneck event would be expected to _______.

A
be better able to adapt to changing environmental pressures
B
have few instances of inbreeding
C
be more susceptible to disease and famine
D
retain significant genetic diversity
10

A clown fish takes shelter in a sea anemone, protecting the sea anemone by chasing away butterfly fish. What two types of interactions are described in this scenario?

A
Predation and commensalism
B
Predation and mutualism
C
Competition and commensalism
D
Competition and mutualism
11

Which of the following occurs from one trophic level to another?

A
energy increases
B
entropy decreases
C
biomass decreases
D
all of the above
12

If predators A and B prey upon the same species and predator A is eliminated, the population of predator B will likely __________.

A
be eliminated
B
increase
C
decrease
D
remain the same
13

The carbon cycle involves an exchange of carbon between _______.

A
the geosphere and atmosphere
B
the atmosphere and hydrosphere
C
the geosphere and hydrosphere
D
the geosphere, hydrosphere, and atmosphere
14

Why is phytoplankton located near the ocean’s surface?

A
It cannot live in areas of high salinity.
B
It can more easily evade predators on the oceans’s surface.
C
It needs access to oxygen only found at the ocean’s surface.
D
It needs sunlight to survive.
15

Why do deciduous trees lose their leaves?

A
Deciduous trees lose their leaves to prevent oxygen loss.
B
Deciduous trees lose their leaves to defend from predators.
C
Deciduous trees lose their leaves to prevent nutrient and water loss.
D
Deciduous trees die in winter.
16

Temperatures in the tundra range from extreme highs to extreme lows.

A
T
B
F
17

Fires are important to savanna ecosystems, but not to grassland ecosystems.

A
T
B
F
18

Increases in entropy lead to _______.

A
limitless work output
B
irreversible changes
C
energy increases
D
all of the above
19

Carnivores have sharp, pointed teeth that allow them to tear flesh from prey. What type of adaptation is this?

A
Behavior
B
Biochemical
C
Physiological
D
Ecological
20

Which of the following is considered an arid biome?

A
grassland
B
desert
C
savanna
D
rainforest

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