Hair of Cotton are

Options

A. Outgrowth of testa
B. Outgrowth of inner layer of perisperm
C. Constituents of aril
D. Formed from caruncle.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the nature of the "hair of cotton." We need to identify what these hairs are and their origin.

2. **Identifying the Source of Cotton Hair**: The hair of cotton is specifically referred to as an outgrowth of the seed coat. The outer layer of the seed coat is known as the testa.

3. **Clarifying the Structure of Cotton Seeds**: Cotton seeds are found within the fruiting body called the "cappus." The cappus contains both the seeds and the lint (the cotton fibers).

4. **Defining the Testa**: The testa is the outer protective layer of the seed. The hairs of cotton are actually extensions or outgrowths from this layer.

5. **Examining Other Options**:
- The hair of cotton is not an outgrowth of the inner layer of the perisperm. The perisperm is a tissue that nourishes the seed.
- The hair of cotton is not a constituent of the aril, which is an additional seed covering that can be hairy or fleshy.
- The hair of cotton is also not formed from the caruncle, which is a structure located in the micropilar region of some seeds.

6. **Conclusion**: The correct identification of the hair of cotton is that it is an outgrowth of the testa.

**Final Answer**: The hair of cotton are outgrowths of the testa.

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