Gemmae develops are asexual buds in some liverwots, these are `:`

Options

A. Green, unicellular structure with apical bud
B. Achlorophyllous, sessile and multicellular structure
C. Stalked, chlorophyllous multicellular structure
D. Located on the lower surface of thallus in diploid receptacles

Answer

**Step-by-Step Solution:**

1. **Understanding Gemmae**: Gemmae are asexual reproductive structures found in some liverworts. They are responsible for the asexual reproduction process.

2. **Identifying Characteristics of Gemmae**:
- Gemmae are typically green in color due to the presence of chlorophyll.
- They are multicellular structures, not unicellular.
- They develop in specialized receptacles known as gemma cups.

3. **Location of Gemma Cups**:
- Gemma cups are located on the thallus of the liverwort.
- Specifically, they are found on the upper surface of the thallus.

4. **Reproductive Process**:
- When gemmae detach from the parent thallus, they can germinate to form new individuals, thus contributing to the asexual reproduction of the liverwort.

5. **Final Conclusion**: Based on the characteristics and functions of gemmae, they can be concluded to be green, multicellular, and located in gemma cups on the upper surface of the thallus.

6. **Correct Answer**: The correct answer to the question is that gemmae are green multicellular structures that develop in gemma cups.