Climate and Change in Ecosystems Answers

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How does an early onset of spring through climate change affect plants?

A
their growing and flowering season starts earlier and is longer
B
their growing and flowering season starts later and is longer
C
their growing and flowering season starts earlier and is shorter
D
their growing and flowering season starts later and is shorter
7

Environmental factors can cause various changes in ecosystems. Which of the following would most likely have the greatest lasting effect on an ecosystem?

A
a seasonal excess of fertilizer runoff
B
a disease among a population
C
change to the landscape from construction
D
seasonal drought
8

Rising levels of carbon dioxide most likely

A
have a greater detrimental effect on the land than the sea.
B
have a greater detrimental effect on the sea than the land.
C
can increase productivity on the land and the sea.
D
can decrease productivity on the land and the sea.
11

Which of the following is not a possible effect of rising carbon dioxide levels on plants?

A
increased photosynthesis
B
increased plant mortality
C
increased crop productivity
D
increased plant growth
12

What is a possible consequence of climate change to species that have a narrow temperature tolerance range?

A
extinction
B
decreased population
C
changes in migratory patterns
D
all of the above
13

Which of the following could cause a habitat change?

A
introduction of an invasive species
B
a wildfire
C
a mudslide
D
all of the above
14

Which scenario best describes how climate trends might affect animal migration?

A
Animals found in the Arctic may move south.
B
Animals found at the equator may move north.
C
Animals found in higher elevations will move to lower elevations.
D
Animals found in lower elevations will stay in the same location.
15

What effect can fertilizer runoff have on an aquatic ecosystem?

A
increased plant growth leading to a decrease in fish populations
B
increased plant growth leading to an increase in fish populations
C
decreased plant growth leading to a decrease in fish populations
D
decreased plant growth leading to an increase in fish populations
16

How does change to an ecosystem that results in succession benefit the ecosystem?

A
it leads to an increased level of biodiversity
B
it leads to decreased productivity
C
it ends symbiosis between organisms
D
it allows ecosystems to operate independently of each other
17

How do the benefits of natural change to ecosystems compare to the disadvantages?

A
The benefits are outweighed by the disadvantages.
B
The benefits outweigh the disadvantages.
C
The benefits are equal to the disadvantages.
D
There are no disadvantages to natural change in ecosystems.

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