Velamen is not a hypodermal tissue because

Options

A. it does not originate from dermatogen
B. it originates from dermatogen
C. it originates from ground meristem
D. it originates from plerome

Answer

**Step-by-Step Solution:**

1. **Understanding Velamen**: Velamen is a specialized tissue found in the roots of some epiphytic plants, such as orchids. It is characterized as a spongy, multi-layered epidermis that serves to protect the roots and absorb moisture from the atmosphere.

2. **Function of Velamen**: The primary function of velamen is to cover the roots of epiphytes, which are plants that grow on other plants for support but do not derive nutrients from them. This adaptation allows epiphytes to thrive in their environments.

3. **Origin of Velamen**: Velamen originates from the dermatogen, which is the outermost layer of the root meristem. The dermatogen gives rise to the epidermis, and in the case of velamen, it forms multiple layers, making it a multi-layered epidermis.

4. **Distinction from Hypodermal Tissue**: Hypodermal tissues are typically found beneath the epidermis and serve various functions, including storage and support. Velamen, however, is not a hypodermal tissue because it originates from the dermatogen and is essentially an extension of the epidermis, rather than a layer beneath it.

5. **Conclusion**: Therefore, velamen is not a hypodermal tissue because it originates from the dermatogen and is a multi-layered epidermis, rather than being a layer that lies beneath the epidermis.

**Final Answer**: Velamen is not a hypodermal tissue because it originates from dermatogen and is a multi-layered epidermis.

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