Source of nutrition in frog during hibernation, is

Options

A. Mucous present in soil
B. Dead organisms found in soil
C. Nutrition is not required
D. Stored fat

Answer

### Step-by-Step Solution:

1. **Understand Hibernation**: Hibernation is a state of minimal activity and metabolic depression that occurs in certain animals, including frogs. It is characterized by low body temperature, slow breathing, and a reduced metabolic rate.

2. **Identify the Purpose of Hibernation**: The primary purpose of hibernation is to survive periods of extreme cold and resource scarcity, typically during winter months. This allows animals to avoid environments that could be lethal due to low temperatures.

3. **Recognize Energy Sources During Hibernation**: During hibernation, animals rely on stored energy reserves to sustain their metabolic needs. In frogs, the main energy source during this period is lipids (fats).

4. **Understand Fat Utilization**: The stored fats in the form of triglycerides are broken down (hydrolyzed) to release fatty acids into the bloodstream. These fatty acids serve as the primary source of energy for the frog while it is in hibernation.

5. **Conclude the Source of Nutrition**: Since the question asks for the source of nutrition in frogs during hibernation, the correct answer is stored fat, as it provides the necessary energy required for survival during this dormant state.

### Final Answer:
The source of nutrition in frogs during hibernation is **stored fat**.

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