During hibernation, frog respires with

Options

A. Lung only
B. Moist skin only
C. Buccal cavity only
D. External gills and lungs

Answer

**Step-by-Step Solution:**

1. **Understanding Hibernation in Frogs:**
- Hibernation is a state of inactivity and metabolic depression in animals, typically occurring in response to cold temperatures and food scarcity. Frogs enter this state to survive harsh environmental conditions.

2. **Respiratory Structures in Frogs:**
- Frogs possess different respiratory structures at various life stages. As tadpoles, they use gills for respiration in water. Adult frogs primarily use lungs for breathing on land.

3. **Respiration During Hibernation:**
- During hibernation, frogs do not actively use their lungs for respiration. Instead, they rely on a different method due to their inactive state and the surrounding environmental conditions.

4. **Cutaneous Respiration:**
- Frogs can respire through their skin, a process known as cutaneous respiration. This method allows them to absorb oxygen directly from the environment and release carbon dioxide through their moist skin.

5. **Conclusion:**
- Therefore, during hibernation, frogs primarily respire through their moist skin, making the correct answer to the question "moist skin only."

**Final Answer:**
During hibernation, frogs respire with moist skin only.

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