AnswersNC-Earth Environmental Science LBRelationships Among Organisms

Relationships Among Organisms — Unit test Answers

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3

Which sustainable practice is paired correctly with its impact on the environment?

A
Using bamboo results in an increased use of forest trees.
B
Practicing contour plowing results in a need for more land.
C
Setting irrigation systems to run longer results in a reduction of water use.
D
Building more wind farms results in a reduction of fossil fuel use.
4

Review the picture below.Which would be the most accurate title for this picture?

Question illustration
A
primary succession after a controlled fire
B
primary succession after a volcanic eruption
C
secondary succession after a controlled fire
D
secondary succession after a volcanic eruption
6

What best describes the association between the carbon cycle, plants, and animals?

A
Plants fix carbon and release oxygen, and animals release carbon and use oxygen.
B
Animals fix carbon and release oxygen, and plants release carbon and use oxygen.
C
Animals fix carbon through respiration, and plants fix carbon through photosynthesis.
D
Plants decompose fixing carbon, and animals decompose releasing carbon.
7

Which molecule would be the most affected by limited nitrogen?

A
myofibrillar proteins in muscle
B
glucose molecules in starch
C
fat molecules surrounding organs
D
cellulose molecules in plant cell walls
8

A group of environmentalists was discussing the benefits and drawbacks associated with using fossil fuels. Which argument best fits the conversation?

A
Fossil fuels are cheaper than alternative forms of energy.
B
Fossil fuel reserves will never be depleted.
C
Fossil fuels are easily renewed.
D
Fossil fuel use does not affect the environment.
9

Which human activity is correctly paired with the greenhouse gas that it increases?

A
rice cultivation and water vapor
B
landfilling and carbon dioxide
C
deforestation and methane
D
sewage treatment and nitrous oxide
10

The map shows the distribution of wild boars in the United States (shaded area). Which of these facts about wild boars is best supported by the evidence provided?

Question illustration
A
Wild boars were brought to the United States by humans.
B
Wild boars have quickly spread through the United States.
C
Wild boars have established successfully mostly in areas with warm climates.
D
Wild boars have a high reproductive rate and no natural predators.
12

Rainforests around the world are being cleared at an alarming rate to make room for new communities, agriculture, mining, and roads, and to provide lumber for construction and furniture. How might the destruction of rainforests affect the balance of gases in Earth's atmosphere?

A
by increasing carbon dioxide and decreasing oxygen
B
by increasing carbon dioxide and increasing oxygen
C
by decreasing carbon dioxide and increasing oxygen
D
by decreasing carbon dioxideand decreasing oxygen
13

Which statement best compares consumers and decomposers?

A
Both get their energy by feeding on other organisms.
B
Both get their energy by photosynthesizing.
C
Consumers feed on other organisms, and decomposers make their own food.
D
Consumers make their own food, and decomposers feed on other organisms.
16

A mountain lion population recently experienced a drop in population size. Which of the following would best describe the limiting factor that is involved?

A
A change occurred in the genetic variability.
B
The deer population experienced a rapid decline due to a parasite.
C
Mountain lion hunting experienced an increase in restrictions.
D
The population of Trichinella, a parasite, experienced a decline.
17

Which of these is an autotroph?

A
consumer
B
producer
C
carnivore
D
herbivore
18

How would an increase in nest sites affect a population of pigeons?

A
The population would decrease.
B
The population would increase.
C
The population would remain almost the same.
D
The population would be reduced the next year.
19

Which determines carrying capacity?

A
logistic factors
B
exponential growth
C
population growth
D
limiting factors
20

Which best describes how an organism’s niche is determined?

A
An organism's habitat and inherited traits determine its niche by influencing how it interacts with the environment and other organisms.
B
An organism’s reproductive rate and population size determine its niche in an ecosystem.
C
An organism's physical size and strength determine its niche by helping it dominate other species.
D
An organism's location and prey determine its nice, regardless of its behaviors or traits.

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