Which Statement(s)about Ribs Is Correct

question 56

Multiple Choice

Which statement(s) about ribs is correct?

• A)ribs prevent collapse of the lungs and help make negative pressure breathing possible.
• B)fishes have a pair of ribs for every vertebra.
• C)leopard frogs lack ribs altogether.
• D)most humans have 12 pairs of ribs but about one-in-twenty has a thirteenth pair.
• E)all of the choices are correct.

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The biological and physiological changes that occur in an organism over time, leading to maturation and eventually the decline of bodily functions.

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