Science Chapter 5

Which of the following is the source of MUCH of the oxygen in the atmosphere?

• plants

• volcanoes

• trucks and cars

• plankton in the ocean

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Which adaptation best helps elk survive in the taiga biome?

• think fur

• large antlers

• change of color

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which biome has more species than any other biome?

• taiga

• grassland

• deciduous forest

• tropical rainforest

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Why do trees, like maple and spruce, grow in temperate rainforest communities?

• the trees grow well in the wet,cool climate.

• the trees grow well in the wet, hot climate.

• the trees grow well in the dry, cool climate.

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In the ecosystem, birds depend on insects to survive. If someone spread pesticide to control the insect population, which of the following is most likely to happen?

• the bird population will increase

• the bird population will decrease

• the bird population will increase, then decrease

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The energy pyramid has the greatest amount of energy...

• at the top of the pyramid

• in the middle of the pyramid

• at the bottom of the pyramid

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How do carnivores obtain energy?

• they eat plants

• they eat animals

• they eat plants and animals

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What role do decomposers play in ecosystems?

• break down nitrogen and oxygen

• break down waste and dead matter

• provide nutrients for carnivores

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When decomposers break down the remains of dead organisms, what do they make that can be used by the plants?

• starch

• cellulose

• nitrogen compounds

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Corals have a symbiotic-relationship with plant-like algae that grow inside them. How do the algae benefit the coral?

• releases toxins to keep away predators

• help the coral make a hard outside coating

• allow the corals to live in deep water

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