Ecology 102

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A recent study has shown an increase in the number of predators in an ecosystem. Which of the following is not a possible cause for the growth?
a.
An increase in the land space available
b.
An increase in the population of prey it feeds on
c.
An increase in the biodiversity of the ecosystem
d.
An increase in the number of predators that feed on it

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What types of organisms will be affected by a decreased supply of water in an ecosystem?
a.
Producers, consumers, and decomposers will be affected.
b.
Producers and consumers will be affected.
c.
Consumers and decomposers will be affected.
d.
No organisms will be affected.

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Suppose a group of bobcats that normally live and hunt in the tops of mountains, start hunting prey at the base of the mountain and move into the valley below. Which of the following will most likely happen to the prey in the valley?
a.
Their numbers will soon increase.
b.
Their numbers will soon decrease.
c.
They will move to the tops of the mountains.
d.
They will remain unchanged.

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Arrange the events of succession in their proper order.
a.
pioneer species, plant growth, soil formation
b.
pioneer species, soil formation, plant growth
c.
soil formation, pioneer species, plant growth
d.
soil formation, plant growth, pioneer species

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Sunlight can be considered a food resource.

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Suppose a predator species became extinct over a short period of time. Which of the following would most likely happen to that predator's prey species in the short term?
a.
They will increase in numbers.
b.
Their numbers will decrease significantly.
c.
They will become extinct as well.
d.
There will be no change in the prey species.

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What determines the carrying capacity of an ecosystem?
a.
the number of different types of organisms in an ecosystem
b.
the amount of available resources
c.
the square mileage it encompasses
d.
the ratio of biotic to abiotic factors

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Pioneer species survive by living on rocks and minerals.

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Which of the following factors might be affected by a wildfire?
a.
food
b.
shelter
c.
biodiversity
d.
all of the above

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Which of the following does not occur in an aquatic ecosystem as a result of nutrient loading?
a.
acidification of the water
b.
algae growth as a result of eutrophication
c.
degraded quality of water for human and livestock consumption
d.
improved water habitats for human recreation

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Ecology 102

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