Respiration in the tadpole of frog takes place by

Options

A. Lungs
B. Gills
C. Buccal cavity
D. Skin

Answer

### Step-by-Step Solution:

1. **Understanding the Life Stage**: Recognize that a tadpole is the larval stage of a frog. At this stage, the tadpole is primarily aquatic and has specific adaptations for breathing.

2. **Identifying the Respiration Process**: In tadpoles, respiration occurs mainly through a process called **branchial respiration**. This means they primarily use gills to extract oxygen from water.

3. **Function of Gills**: Gills are specialized organs that allow the tadpole to take in oxygen dissolved in water and expel carbon dioxide. This is crucial for their survival in an aquatic environment.

4. **Air Intake Mechanism**: While tadpoles primarily breathe through gills, they also have a unique method of sucking air bubbles from the water surface. They do this by dropping the floor of their mouth to create an air pocket, which they can then pinch off by closing their jaws.

5. **Transition to Lungs**: As tadpoles mature (usually around 4 weeks), they begin to develop lungs. However, during the early stages of their life, gills remain the primary means of respiration.

6. **Conclusion**: Therefore, the respiration in tadpoles occurs mainly through gills, although they can also utilize lungs as they develop.

### Final Answer:
Respiration in the tadpole of a frog takes place by **gills**.

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