How Does a Swim Bladder Help the Ray-Finned Fishes Maintain

question 59

Multiple Choice

How does a swim bladder help the ray-finned fishes maintain buoyancy?

• A) It removes water from the digestive tract.
• B) It removes oxygen from the water and stores it.
• C) Gas is added to the bladder as the fish's depth increases.
• D) Gas is removed from the bladder as the fish's depth increases.
• E) It adds and removes salt from the water stored in the bladder, which changes its density and thus its buoyancy.

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Definitions:

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