Practice Test Answers

16 verified answers
1
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A muskrat population is growing exponentially. What might cause this population to enter logistic growth?

A
resources become scarce
B
carrying capacity is increased
C
birth rate increases
D
emigration decreases
2
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Natural resources are classified as renewable and nonrenewable. What is the difference between the two?

A
whether or not the resource dwindles in supply
B
whether or not the resource can be replaced
C
whether or not the resource is useful to humans
D
whether or not the resource exists in nature
4

Which graph best represents the relationship between niche diversity and biodiversity?

A
Image with description A graph with sustainability on the vertical axis and increasing biodiversity on the horizontal axis. The line is horizontal.
B
Image with description A graph with sustainability on the vertical axis and increasing biodiversity on the horizontal axis. The line slopes upward from left to right.
C
Image with description A graph with sustainability on the vertical axis and increasing biodiversity on the horizontal axis. The line is vertical.
D
Image with description A graph with sustainability on the vertical axis and increasing biodiversity on the horizontal axis. The line slopes downward from left to right.
5

Which statement best describes the purpose of Earth's spheres?

A
They work independently as closed systems to move nutrients to living and nonliving parts of Earth.
B
They work independently as closed systems to cycle matter through ecosystems.
C
They work together as open systems to move matter to living and nonliving parts of Earth.
D
They work together as open systems to cycle matter through ecosystems.
6

How would a harsh winter most likely affect the rabbit population size?

A
population decreases
B
population increases
C
population completely dies off
D
population reaches carrying capacity
7

Which animals form a eusocial society?

A
moose
B
ants
C
cheetahs
D
polar bears
8

How do limiting factors most affect population size?

A
decrease population growth
B
increase population growth
C
restrict population growth
D
stop population growth
10

Which best describes what happens when an animal does not form a social group?

A
Reproduction is easier because of access to multiple mates.
B
The division of labor is more difficult as it increases competition.
C
Foraging is more difficult when hunting a large prey.
D
Fighting off predators is easier with one individual.
12

Pandas eat bamboo for energy. What are pandas classified as?

A
consumers
B
autotrophs
C
decomposers
D
producers
13

Which is an example of biodiversity contributing to the sustainability of an ecosystem?

A
The ocean can only support organisms that can survive salty conditions.
B
One species of plant has been growing in a field for several years.
C
Many kinds of fruit trees support a variety of birds and other animals in a forest.
D
A meadow covers a large area of land, providing shelter to many organisms.
14

How does mining impact the environment?

A
It has a negative impact on the environment by providing new niches for wildlife to inhabit.
B
It has a positive impact on the environment by releasing chemicals into the environment.
C
It has a positive impact on the environment by permanently altering the ecosystem.
D
It has a negative impact on the environment by allowing toxic chemicals to harm wildlife.
15

Which statement best compares the carbon cycle and the nitrogen cycle?

A
Both involve the work of decomposers.
B
Both release oxygen as a waste product.
C
Both require fixation in order to convert molecules.
D
Both cycle water from Earth's surface to the atmosphere.

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Practice Test Answers — CMS 2026-2027 Biology…