Food Chains and Food Webs Review

Producers are generally found at the beginning

of a food chain. Which statement best explains

why this is true?

• A) Producers are usually smaller in size than

  consumers.

• B) Producers do not rely on other organisms

  for food.

• C) There are always more consumers than

  producers in food chains.

• D) Consumers are always more complex

  organisms than producers.

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The organisms represented by X are

• A) Decomposers

• B) Producers

• C) Carnivores

• D) Scavengers

Which would be the most likely effect of a

drastic reduction in all the producer organisms

in a meadow environment?

• A) The grasshoppers would multiply rapidly.

• B) The rabbit population would decrease.

• C) All of the snake populations would

  increase.

• D) All of the decomposers would die.

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Most of the food and oxygen in the

environment is produced by the action of

• A) saprophytic bacteria

• B) heterotrophic organisms

• C) aerobic protozoans

• D) autotrophic organisms

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Which two organisms are classified as producers?

• A) tadpole and worm

• B) algae and grass

• C) grass and tadpole

• D) raccoon and algae

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For a producer to maintain itself, which factor

must be present in its environment?

• A) carnivores

• B) herbivores

• C) sunlight

• D) parasites

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A fruit fly is classified as a consumer rather

than as a producer because it is unable to

• A) reproduce asexually

• B) synthesize its own food

• C) release energy stored in organic molecules

• D) remove wastes from its body

Because turkey vultures feed mainly on animals

that they have not killed, they are known as

• A) predators

• B) scavengers

• C) omnivores

• D) autotrophs

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Which row in the chart below best describes decomposers?

• 1

• 2

• 3

• 4

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Which organisms are primary consumers?

• A) grass, mice, and hawks

• B) owls, snakes, and hawks

• C) seeds, grass, and shrubs

• D) songbirds, mice, and rabbits

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