Organism Interactions in Ecosystems

Overall, all the interactions between organisms in ecosystems...

• Keep ecosystems & populations unstable and random

• Keep ecosystems & populations stable and balanced

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NGSS.MS-LS2-2

NGSS.MS-LS2-1

NGSS.MS-LS2-4

In which type of interaction does one animal eat another for energy and nutrients?

• Competition

• Parasitism

• Predation

• Mutualism

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NGSS.MS-LS2-3

Which of the following is NOT a symbiotic relationship?

• Competition

• Commensalism

• Mutualism

• Parasitism

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NGSS.MS-LS2-2

What term describes organisms striving for the same limited resources?

• Competition

• Predation

• Mutualism

• Commensalism

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NGSS.MS-LS2-1

Commensalism is a symbiotic relationship in which what occurs between the organisms?

• both organisms are harmed

• one benefits, the other is unaffected

• one benefits, the other is harmed

• one benefits by eating the other

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NGSS.MS-LS2-2

Fleas living within a mammal's fur describes this type of relationship:

• Competition

• Mutualism

• Predation

• Parasitism

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NGSS.MS-LS2-2

Which interaction type is it when different male lions strive to find territories?

• Intraspecific Competition

• Interspecific Competition

• Commensalism

• Mutualism

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NGSS.MS-LS2-2

A crab is protected from fish when an anemone rides on its shell. The anemone gets more food.

• Commensalism

• Competition

• Predation

• Mutualism

This interaction occurs when lions, cheetahs, and leopards all need the same food source.

• Intraspecific Competition

• Interspecific Competition

• Predation

• Mutualism

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NGSS.MS-LS2-2

NGSS.MS-LS2-1

Orchid vines are skinny and grow on the trunk of trees to get more light and space with no negative effect.

• Mutualism

• Commensalism

• Parasitism

• Competition

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NGSS.MS-LS2-2