Unit Test — Unit test Answers

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1
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Which graph best represents the relationship between niche diversity and biodiversity?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
2
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Which describes a disruption in the water cycle that could affect photosynthesis?

A
Heat causes an excess of transpiration.
B
Heat causes an excess of evaporation.
C
Heat causes an excess of condensation.
D
Heat causes an excess of precipitation.
3

What term includes all the biotic and abiotic factors in an area?

A
ecosystem
B
population
C
community
D
organ
4

What is an ice age?

A
a recent increase in the average global temperature near Earth’s surface
B
a period of time when temperatures across the planet are colder than normal
C
a characteristic of winter that returns seasonally
D
the loss of heat in coastal areas from La Niña storms
5

organismpopulationecosystemspecies

A
organism
B
population
C
ecosystem
D
species
6

What is the primary source of energy for food chains in an ecosystem?

A
decomposers
B
producers
C
consumers
D
the sun
7

Water exits the leaves of plants and enters the atmosphere. What is this process called?

A
photosynthesis
B
condensation
C
transpiration
D
precipitation
8

How does conservation affect biodiversity?

A
It helps to preserve climate change.
B
It decreases species diversity.
C
It helps to preserve biodiversity.
D
It decreases ecosystem diversity.
9

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

A
resources become scarce
B
birth rate increases
C
emigration decreases
D
carrying capacity is increased
10

Humans process some foods by adding chemicals to reduce harmful bacterial growth. This allows foods to be edible for longer periods of time. Which best describes the advantages of food processing?

A
control of density-independent limiting factors such as disease spread
B
control of density-dependent limiting factors such as disease spread
C
control of density-dependent limiting factors such as predation
D
control of density-independent limiting factors such as predation
11

Humans affect the carbon cycle in many ways through the use of fossil fuels, clear cutting of forests, and controlled burns. Which process can help counteract these human interactions?

A
photosynthesis
B
respiration
C
decomposition
D
building proteins
12

A large manufacturing company releases chemicals into the air every day. The chemicals eventually make their way into local bodies of water, killing many of the organisms that live in these areas.

A
habitat destruction due to pollution
B
habitat destruction due to poaching
C
pollution due to poaching
D
poaching due to habitat destruction

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