Biodiversity Unit Test Review

What best describes why a rain forest is a stable and productive ecosystem?

• It resists the impacts of habitat loss by humans.

• It has a wide variety of plants, animals, and other organisms.

• It has more top predators than other ecosystems.

• It has high levels of invasive species.

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What would happen to the snowshoe hare if lynxes were removed from the ecosystem?

• It would decrease gradually

• It would grow slowly

• It would grow exponentially

• It would remain stable

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These species have no competitors and no natural predators.

• invasive species

• exotic species

• endemic species

Which is true about changes in ecosystems?

• Most organisms can survive changes to their ecosystem.

• Changes in one part of an ecosystem don't affect other parts.

• A change in one factor can affect other parts of the ecosystem.

• Changes in abiotic factors have no effect on biotic factors.

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Which option best indicates an unhealthy ecosystem?

• Biodiversity is decreasing

• Biodiversity is increasing

• Biodiversity is stable

• Biodiversity is fluctuating

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Planting grasses and shrubs-Does it increase or decrease erosion?

• Increases erosion

• Decreases erosion

How do trees help in reducing soil erosion?

• Weight of trees on the ground keeps the soil in place

• Trees absorb the water in the ground and keeps soil from being washed away

• Trees take in soil through their roots leaving little that can be washed away

• Tree roots firmly hold the soil in place preventing it from being washed away

Which method is not a way to conserve land?

• cut and burn methods of clearing land

• limits on clear cut of forests

• rain water harvesting

• sea walls

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Which statement best describes the impact the bushes will most likely have?

• Positive impact by helping to preserve the lake's coast

• Negative impact by helping to erode the lake's coast

• Positive impact by helping to erode the lake's coast

• Negative impact by helping to preserve the lake's coast

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Which of these design solutions would be mosts effective for maintaining biodiversity and ecosystem services?

• Increasing fertilizer to maximize crop yeilds

• Build a dam to control water flow and generate power

• Create a wildlife corridor to connect fragmented habitats

• Construct a new road through a protected area to increase access for human use

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