Thin, scaleless, moist skin of frog is an adaptation for 

Options

A. Buccopharyngeal respiration
B. Pulmonary respiration
C. Cutaneous respiration
D. Cloacal respiration

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the adaptation of the thin, scaleless, moist skin of frogs. We need to identify what this adaptation is primarily used for.

2. **Analyzing the Options**:
- **Cloacal Respiration**: This option refers to respiration through the cloaca. However, the cloaca is primarily involved in excretion and reproduction, not respiration. Therefore, this option is incorrect.

- **Pulmonary Respiration**: This type of respiration involves the lungs. Frogs do have lungs, but the question specifically mentions the skin, which is not the primary organ for pulmonary respiration. Thus, this option is also incorrect.

- **Bucopharyngeal Respiration**: This process involves respiration through the buccal cavity and pharynx. While it is a method of respiration, it does not directly relate to the skin's adaptation. Hence, this option is incorrect as well.

- **Cutaneous Respiration**: This type of respiration occurs through the skin. Frogs have thin, scaleless, and moist skin which allows for the exchange of gases (oxygen and carbon dioxide) directly with the environment. This is a key adaptation for frogs, especially since they often live in moist environments.

3. **Conclusion**: After analyzing all the options, the correct answer is **cutaneous respiration**. The thin, scaleless, and moist skin of frogs is specifically adapted for this type of respiration.

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