Question

The diaphragm is characteristic of

• A. Mammals
• B. Reptiles
• C. Birds
• D. All vertebrate

Answer 1

The correct option is A

Mammals

The correct option is A

Explanation of the correct option:

1. The presence of the diaphragm is only seen in the case of mammals.
2. The muscular organ contracts rhythmically during breathing.

Explanation of the incorrect option:

Option B:

Reptiles have chest muscles instead of diaphragms to aid in respiration.

Option C:

Birds do not have diaphragms, instead, they have air sacs that reach into bones to allow airflow.

Option D:

Not all vertebrates, but only mammals have diaphragms.

Final answer: The diaphragm is characteristic of mammals.