Lab: Interdependence of Organisms Answers

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Phytoplankton are .

autotrophs

heterotrophs

neither

Grizzly bears are .

primary consumers

secondary consumers

tertiary consumers

Flower:

producer

consumer

decomposer

Butterfly:

producer

consumer

decomposer

Both the salmon and the grizzly bears are .

producers

consumers

decomposers

If the grass contains 100,000 kcal of energy, how much energy will a fox obtain from eating a bird?

10,000 kcal

1,000 kcal

100 kcal

10 kcal

Bird:

producer

consumer

decomposer

What would you expect to happen if sea otters were removed from this food web? Check all that apply.

The population of elephant seals would decrease.

The population of kelp crabs would increase.

The population of kelp would increase.

The population of sea urchins would decrease.

Earthworm:

producer

consumer

decomposer

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