Ecology — Test Answers

25 verified answers
21
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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 increasing oxygen
B
by decreasing carbon dioxide and increasing oxygen
C
by increasing carbon dioxide and decreasing oxygen
D
by decreasing carbon dioxideand decreasing oxygen
22
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Freshwater can be renewed, but environmentalists consider it nonrenewable. Why is there a contradiction in classification?

A
Freshwater is highly affected by global warming, and is quickly evaporating.
B
Freshwater is recycled through the use of irrigation, bathing, and everyday use.
C
Freshwater evaporates and condenses, and then precipitation returns it to the lakes.
D
Freshwater is easily polluted or depleted before it can be replaced.
23

Which molecule would be the most affected by limited nitrogen?

A
fat molecules surrounding organs
B
myofibrillar proteins in muscle
C
glucose molecules in starch
D
cellulose molecules in plant cell walls
24

Which would be the most accurate title for this picture?

A
primary succession after a volcanic eruption
B
secondary succession after a volcanic eruption
C
secondary succession after a controlled fire
D
primary succession after a controlled fire
25

Which would have to happen to keep the population growth of cheetahs in 2013 the same the previous years?

A
3 deaths, 6 births, 5 immigration, 7 emigration
B
4 deaths, 7 births, 2 immigration, 6 emigration
C
1 deaths, 5 births, 3 immigration, 7 emigration
D
5 deaths, 2 births, 8 immigration, 3 emigration

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