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.
Correct Answer:
Verified
Correct Answer:
Verified
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