Educational Changes/Food Web/Interdependency

Producers are generally found at the beginning of a food chain. Which statement best explains why this is true?

• Producers are usually smaller in size than consumers.

• Producers do not rely on other organisms for food.

• There are always more consumers than producers in food chains.

• Consumers are always more complex organisms than producers.

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The diagram below represents a marine food web. The organisms represented by X are

• decomposers

• producers

• carnivores

• scavengers

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NGSS.MS-LS2-3

The diagram below represents an energy pyramid. Which organisms would most likely be found at level A?

• birds

• worms

• mammals

• algae

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NGSS.MS-LS2-3

For a producer to maintain itself, which factor must be present in its environment?

• carnivores

• herbivores

• sunlight

• parasites

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NGSS.MS-LS1-6

NGSS.MS-LS2-1

Most of the food and oxygen in the environment is produced by the action of

• saprophytic bacteria

• heterotrophic organisms

• aerobic protozoans

• autotrophic organisms

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

The diagram below represents a food web. Two of the herbivores represented in this food web are

• toads and snakes

• deer and mice

• wolves and raccoons

• grasshoppers and toads

Because turkey vultures feed mainly on animals that they have not killed, they are known as

• predators

• scavengers

• omnivores

• autotrophs

Which nutritional relationship described below contains an organism that can be classified as a heterotroph, secondary consumer, and scavenger?

• A field mouse eats an ear of corn.

• Certain bacteria live in nodules on clover roots.

• A crow eats a portion of a dead rabbit.

• A peregrine falcon kills and eats a pigeon.

A fruit fly is classified as a consumer rather than a producer because it is unable to

• reproduce asexually

• synthesize its own food

• release energy stored in organic molecules

• remove wastes from its body

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Horses are herbivores and, as a result, can be classified as

• omnivores

• primary consumers

• secondary consumers

• decomposers