Sterile uniseriate and multicellular hair present in receptacles of moss is

Options

A. Epiphysis
B. Paraphysis
C. Apophysis
D. Hypophysis.

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks about a specific type of hair found in the receptacles of moss. The options provided are epiphysis, paraphysis, apophysis, and hypophysis.

2. **Identifying Key Terms**:
- **Sterile**: This indicates that the hair does not produce spores.
- **Uniseriate**: This means that the hair is composed of a single row of cells.
- **Multicellular**: This indicates that the hair is made up of multiple cells.

3. **Analyzing the Options**:
- **Epiphysis**: This term generally refers to a structure that grows on another plant but does not fit the description of the hair in moss.
- **Paraphysis**: This is a sterile, filament-like structure that supports reproductive organs in various plants, including mosses.
- **Apophysis**: This term refers to a part of the sporangium in some plants and does not match the description.
- **Hypophysis**: This term usually refers to a structure in embryonic development and is not related to moss hair.

4. **Identifying the Correct Answer**: Based on the definitions and characteristics of the options, **paraphysis** is the correct answer. Paraphysis is a sterile, uniseriate, multicellular hair found in the receptacles of moss.

5. **Conclusion**: Therefore, the sterile uniseriate and multicellular hair present in the receptacles of moss is called **paraphysis**.

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