Energy Flow in Ecology

A food web is made up of 

• one food chain.

• only producers.

• many different food chains.

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An organism that needs to eat other organisms to obtain energy is known as a:

• Autotroph

• Producer

• Consumer

• Mutualist

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In this food web, which two organisms could be harmed if the mouse population were to decrease?

• Deer and caterpillar

• Wolf and snake

• Oak and grass

• Hawk and songbird

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Autotrophs are organisms that produce their own food. Which do scientist classify as autotrophs?

• Chordates

• Fungi

• Plants

• Molds

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Which animal is not the apex predator but, a predator to a mouse?

• hawk

• rabbit

• snake

• grass

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In this aquatic food web, which organism(s) eats the squid?

• Seal and seagull

• Blue whale

• Seagull and krill

• It has no predators

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When energy is passed in an ecosystem from one trophic level to the next, only ___ percent of the energy will be passed on.

• 1

• 10

• 100

• 50

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In this food web, a ___ is a primary consumer and a ___ is a secondary consumer.

• rabbit, snake

• grass, mouse

• rabbit, wildflower

• snake, mouse

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In this food web, how many different organisms feed on the producer?

• 2

• 3

• 4

• 5

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If the snake population decreased, which populations would increase as a result?

• Birds and Frogs

• Hawks and Frogs

• Birds and Hawks

• Frogs and Butterflies

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