Food Chains, Food Webs, Symbiotic Relationships

The picture above shows an ocean bay food chain. Sea otters move into the ocean bay area. They eat all the sea urchins. This change will cause

• the kelp to have less food

• the crabs to have more food

• the sea ducks to have less food

• the arctic foxes to have more food

What is a trophic level?

• Each level represented within a food chain or web.
• Levels of ecosystems that the world is divided into.
• Different levels of nutrients present within an organism.
• The levels of sunlight an autotroph needs to survive. 

• A

• B

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• D

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An organism that obtains its food at the expense of another living organism is known as a

• host

• saprophyte

• parasite

• scavenger

Some small fish attach themselves to the body of a shark with harming the shark and feed upon the leftovers from the sharks meal. The relationship between the shark and this fish is an example of

• Commensalism

• mutualism

• competition

• parasitism

• A

• B

• C

• D

• A

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• D

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• C

• D

• A

• B

• C

• D