Intensity and duration of light in earthworm's body is perceived by

Options

A. Photoreceptors
B. Epidermal receptors
C. Buccal receptors
D. Eyes

Explanation

To answer the question "Intensity and duration of light in earthworm's body is perceived by," we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding the Options**:
- The options given are:
- 1. Photoreceptor
- 2. Epidermal receptor
- 3. Buccal receptor
- 4. Eyes

2. **Evaluating Each Option**:
- **Photoreceptor**: These are specialized cells that can detect light intensity and duration. They are responsible for sensing light in various organisms.
- **Epidermal receptor**: These receptors are primarily responsible for the sense of touch and do not specifically perceive light.
- **Buccal receptor**: These receptors are involved in the sense of smell and taste, not light perception.
- **Eyes**: Earthworms do not have true eyes; they have light-sensitive cells but no complex eye structures.

3. **Identifying the Correct Answer**:
- Since earthworms do not possess eyes and the other receptors (epidermal and buccal) do not detect light, the only option left that is responsible for perceiving light intensity and duration is the **photoreceptor**.

4. **Conclusion**:
- Therefore, the correct answer is **Photoreceptor**.

### Final Answer:
The intensity and duration of light in earthworm's body is perceived by **Photoreceptor**.

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