You need to explain to your study group why the breathing ability of amniotes is

Question

You need to explain to your study group why the breathing ability of amniotes is different than that of amphibians. Your classmates argue that something like a terrestrial salamander is identical in its breathing mechanism to an amniote. To convince them of the critical breathing innovations of amniotes, you report that in order to breathe as an amniote does, the terrestrial salamander would have to

Develop new muscular associations in the ribcage.

grow lungs.

reduce the size of its mouth.

Develop new muscular associations in the ribcage.

grow lungs.

reduce the size of its mouth.

Explanation / Answer

In order to breathe as an amniote does, the terrestrial salamander would have to develop new muscular associations in the ribcage. The reduction of the size of mouth and increasing lung size cannot alter rate of ventilation.

Thus, the correct option is (A).

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