Unit Test — Cumulative exam Answers

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1
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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
2
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Which of the following best describes daily temperatures in deserts?

A
hot during the day and cold at night
B
hot during the day and warm at night
C
cool during the day and very cold at night
D
they depend upon the type of desert and its location
3

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
4

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

A
T
B
F
6

Earth’s cycles provide organisms with continued access to usable elements necessary for sustaining life.

A
T
B
F
7

Which of the following is not a reason for cluster distribution of organisms?

A
localized availability of resources
B
herd behavior
C
hive behavior
D
territorial behavior
8

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

A
T
B
F
9

Which of the following is not a method to determine population size?

A
mark/recapture
B
sampling
C
hypothesis
D
observation
10

A species of plants that adapts to become more tolerant of toxic heavy metals produced as a result of human mining activities is an example of _______.

A
stabilizing selection
B
disruptive selection
C
directional selection
D
mutation
11

Yellowstone National Park has 124 wolves living in it. The park covers 3472 square miles. What is the population density of wolves living in Yellowstone?

Question illustration
A
28 wolves/mi
B
0.0357 wolves/mi
C
82 wolves/mi
D
43 wolves/mi
12

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.
13

Mammals were not contemporaries of the dinosaurs.

A
T
B
F
15

Which of the following is considered an arid biome?

A
grassland
B
desert
C
savanna
D
rainforest
16

Why do deciduous trees lose their leaves in the fall?

Answer not available
17

Which of the following is a way humans have impacted the rainforests, but not the tundra?

A
oil drilling
B
mining
C
overgrazing
D
logging
18

Jackrabbits’ large ears are an adaptation for _______.

A
hunting prey
B
enhanced hearing
C
storing water
D
dissipating heat
19

Explain the function of the thick bark found on deciduous trees.

Answer not available
20

Which of the following animals is not found in the tundra?

A
polar bear
B
caribou
C
pangolin
D
wolverine

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