Question

In frog, cutaneous respiration occurs

• A. Only in water, in the absence of pulmonary respiration
• B. Only in water, along with pulmonary respiration
• C. Only on land
• D. Always

Answer 1

The correct option is D Always

The mucus glands present in the skin of the frog helps to absorb dissolved oxygen from the air. However, the frogs have three respiratory surfaces and exchange of gases with the surroundings through the skin is a continuous process.
Therefore, the correct answer is option D.