Unit 7 Review

Put the following terms in order from smallest to largest (#1 is smallest, #6 is largest): Ecosystem, Population, Biosphere, Organism, Biome, Community

• Organism, Population, Community, Ecosystem, Biome, Biosphere

• Organism, Community, Population, Ecosystem, Biome, Biosphere

• Organism, Population, Community, Ecosystem, Biosphere, Biome

• Organism, Population, Ecosystem, Community, Biome, Biosphere

Clownfish, sea anemone, coral, sea urchins, sponges, and parrot fish are just a few examples of the large variety of organisms that can be found in a coral reef. The coral reef and its inhabitants are suffering due to several factors such as pollution, coastal development, sedimentation and destructive fishing practices. What would be the most likely result if some of the species in the coral reef are destroyed?

• Other organisms would move into the coral reef area.

• The coral reef would be allowed to flourish without so many fish and plants living in and around it.

• The coral reef would begin to deteriorate without the variety of fish and plants necessary to maintain balance.

• The waters surrounding the coral reef will become cool with the decreasing number of organisms living there.

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Which of these types of environments is MOST LIKELY to experience the arrival of pioneer species?

• an old growth forest

• an undisturbed prairie

• an established mountain lake

• a newly formed volcanic island

An ecosystem with great biological diversity decreases —

• the number of species present in the ecosystem

• competition between different species in the ecosystem

• available space for organisms in the ecosystem

• available food supply for organisms in the ecosystem

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Which ecosystem would most likely survive if the grasses were destroyed by a plant virus?

• Ecosystem 1, because there is a variety of producers that support the ecosystem.

• Ecosystem 2, because the grasses could grow back quickly.

• Ecosystem 1, because there are fewer primary consumers.

• Ecosystem 2, because there are not many predators.

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If you were studying vegetation and animal life around a small pond, you would expect to find a greater variety of organisms —

• Area A

• Area B

• Area C

• Area D

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Which of the plants described above would most likely be found in the rainforest?

• 1

• 2

• 3

• 4

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The diagrams above show an ecosystem during different stages of ecological succession.

In which order will these stages occur, from earliest to latest?

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• 2, 4, 3, 1

• 3, 1, 4, 2

• 1, 2, 3, 4

• 4, 2, 1, 3

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How does secondary succession help restore equilibrium to a region destroyed by a flood?

• It increases the number and types of species.

• It brings back species from extinction.

• It stops other floods from occurring.

• It decreases the rate of evolution.

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Which of the following statements correctly demonstrates the process of succession? Select TWO correct answers.

• Weeds grow first in a newly tilled garden.

• Trees grow back first after a forest fire.

• Grass grows quickly after a field is burned.

• Tall shrubs grow before grasses in a wind destroyed forest.

• Oak trees return faster than grass to an area that experienced a landslide.