Brown colour of Earthworm is due to

Options

A. Melanin
B. Porphyrin
C. Haemoglobin
D. both (1) and (2)

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the reason for the brown color of earthworms.

2. **Analyzing the Options**: The options provided are:
- A) Melanin
- B) Porphyrin
- C) Hemoglobin
- D) Both A and B

3. **Evaluating Each Option**:
- **Option A (Melanin)**: Melanin is a pigment that gives color to the skin in humans and some animals. However, it is not found in earthworms. Therefore, this option is incorrect.
- **Option B (Porphyrin)**: Porphyrin is a pigment that can give a brownish color. It is present in earthworms and is responsible for their brown color. This option is likely correct.
- **Option C (Hemoglobin)**: Hemoglobin is a red pigment found in blood that carries oxygen. It does not contribute to the brown color of earthworms, making this option incorrect.
- **Option D (Both A and B)**: Since option A is incorrect, this option cannot be correct either.

4. **Conclusion**: The brown color of earthworms is primarily due to the presence of the pigment **Porphyrin**.

5. **Function of Brown Color**: The brown color serves a protective function, helping to shield earthworms from ultraviolet (UV) light from the sun.

**Final Answer**: The brown color of earthworms is due to the presence of **Porphyrin**.

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