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Succession and Extinction — Unit test Answers

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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.
3

Which statement describes the relationship between plants, animals, and the carbon cycle?

A
Plants use 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 use carbon when they decompose, and animals release carbon when they decompose.
5

Which of these is an autotroph?

A
consumer
B
producer
C
carnivore
D
herbivore
6

Both photosynthesis and cellular respiration are part of the carbon cycle. Which statement best compares these two processes?

A
Both release carbon dioxide as waste.
B
Both provide organisms with usable energy.
C
Both add bacteria to the soil.
D
Both require fixation in order to convert molecules.
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

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.
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 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.
14

What would most likely happen if there were no condensation stage in the water cycle?

A
Water could not convert from a gas to a liquid.
B
Water could not convert from a liquid to a gas.
C
Water could not convert from transpiration to evaporation.
D
Water could not convert from precipitation to evaporation.
15

Which statement describes both a positive impact and a negative impact associated with the effects of nitrogen-enhanced fertilizers?

A
They increase polluted runoff and damage drinking water.
B
They increase plant growth and damage drinking water.
C
They increase denitrifying bacteria and increase plant growth.
D
They increase both limiting resources and denitrifying bacteria.
17

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.
19

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

Question illustration
p
primary succession after a controlled fire
p
primary succession after a volcanic eruption
s
secondary succession after a controlled fire
s
secondary succession after a volcanic eruption
21

Which is one event that may lead to Primary succession?

A
clear-cutting
B
climate change
C
volcanic eruption
D
introduced species

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