Four organisms are illustrated here.

Which organism can make its own food?

• Rabbit

• Daisy

• Mushroom

• Earthworm

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An elephant gets the energy it needs to survive when it-

• Drinks water from streams

• Warms itself in the sun

• Eats grass and leaves

• Sleeps on the ground

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A pond food chain is illustrated here. In this food chain, the large fish gets it energy by –

• being food for the hawk

• preying on small fish

• eating plants

• absorbing sunlight

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A prairie food web is illustrated here. If all of the squirrels were removed from this food web, which animal population will most likely decrease first?

• Antelopes

• Coyotes

• Mountain lions

• Hawks

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A pond food web is illustrated here. If a pesticide killed all the insect larvae in this food web, all of the following would immediately result EXCEPT –

• bass would have more minnows to eat

• snails would have more algae available

• sunfish would be forced to eat more snails

• minnows would lose a source of energy

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Plants get their food by —

• making it from sunlight

• eating animals or insects

• absorbing it from the soil

• taking nutrients from the air

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Food webs begin with energy supplied by –

• the Moon

• the Sun

• Earth's core

• green plants

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In order to make their own food, plants need sunlight, water, and which gas from the atmosphere?

• Carbon Dioxide

• Nitrogen

• Oxygen

• Argon

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The diagram illustrates a gulf food web. The herring gull depends directly on all of the following organisms for food EXCEPT –

• blue crab

• grass shrimp

• diamondback terrapin

• sheepshead minnow

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The flow of energy in a prairie food web is shown in the diagram. If a highway were built through the middle of the prairie that destroyed most of the grass, what might be the effect on other organisms?

• Snakes would be forced to eat more mice.

• Deer would move elsewhere to find food.

• Mountain lions would hunt more squirrels.

• Robins would eat a different food than squirrels.

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