Interdependent Relationships in Ecosystems

____________________ study how organisms interact with biotic and abiotic factors in an ecosystem.

• Chemists

• Biologists

• Ecologists

• Geologists

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A tick living on a dog and taking its blood is an example of 

• commensalism

• predation

• mutualism

• parasitism

Fish picking off and eating bits of algae or parasites from a turtle's shell is an example of

• competition

• predation

• commensalism

• mutualism

The living parts of an ecosystem are called

• abiotic factors

• biotic factors

• biology

• microbiology

Why is interdependence important in ecosystems?

• It allows ecosystems to be unaffected by changes

• It ensures that no species have any interaction

• It helps organisms to survive by relying on each other for food, shelter, and other needs

• It makes ecosystems simpler

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What is a food web?

• A single pathway of feeding relationships among organisms in an ecosystem

• A system that recycles nutrients in an ecosystem

• A complex network of feeding relationships among organisms in an ecosystem

• A group of primary consumers eating the same plant

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Organisms interact with biotic and abiotic factors in an

• ecosystem

• ecology

• ecologist

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A consumer that hunts is called:

• producer.

• an omnivore.

• a predator.

• a herbivore.

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If an organism is living inside another and causing it harm, it is an example

• mutualism

• commensalism

• parasitism

If two organisms benefit from a relationship (++), it is called

• mutualism

• commensalism

• parasitism

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