The megaspore of Selaginella on germination produces

Options

A. Female gametes
B. Female gametangia
C. Female prothallus
D. Male prothallus.

Answer

To solve the question "The megaspore of Selaginella on germination produces," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Organism**: Recognize that Selaginella is a type of plant classified under the group of ferns. It is known for exhibiting heterospory, which means it produces two different types of spores: megaspores and microspores.

**Hint**: Identify the characteristics of Selaginella and its classification in the plant kingdom.

2. **Identify the Types of Spores**: In Selaginella, the megaspores are produced in specialized structures called sporophylls, which bear sporangia (the structures that produce spores).

**Hint**: Recall the function of sporophylls and sporangia in the life cycle of ferns.

3. **Germination of Megaspores**: When megaspores germinate, they develop into a structure known as the gametophyte. In the case of megaspores, this gametophyte is specifically the female gametophyte.

**Hint**: Consider what happens during the germination of spores and the type of gametophyte produced from megaspores.

4. **Name the Gametophyte**: The female gametophyte that develops from the megaspore is referred to as the female prothallus. This structure is haploid and will eventually produce the female sex organs.

**Hint**: Remember the terminology used for gametophytes and their respective roles in reproduction.

5. **Conclusion**: Based on the above understanding, we can conclude that the megaspore of Selaginella, upon germination, produces a female prothallus.

**Hint**: Review the options provided in the question to confirm which one corresponds to the female prothallus.

### Final Answer:
The megaspore of Selaginella on germination produces a **female prothallus**.