Scuba Divers Use a BCD to Control Buoyancy

question 73

Multiple Choice

Scuba divers use a BCD to control buoyancy.It is essentially a bag that can be inflated or deflated to prevent excessive sinking or floating.How do bony fish accomplish this?

• A)They pump their operculum.
• B)They adjust the level of gasses in their swim bladder.
• C)They adjust their position using the pectoral and pelvic fins.
• D)They swim rapidly to saturate the blood with oxygen.

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