In gymnosperms, megaspore mother cell divides meiotically to form four megaspores. Out of four megaspores, one develops into a multicellular structure termed as:

Options

A. Female gametophyte
B. Archegonium
C. Ovule
D. Strobili

Answer

To solve the question regarding the multicellular structure that develops from one of the four megaspores in gymnosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Megaspore Mother Cell**: In gymnosperms, the megaspore mother cell undergoes meiosis. This process results in the formation of four haploid megaspores.

2. **Identifying the Fate of Megaspores**: Out of the four megaspores produced, only one megaspore survives and develops further. The other three megaspores typically degenerate.

3. **Development of the Multicellular Structure**: The surviving megaspore develops into a multicellular structure. This structure is crucial for the reproductive cycle of gymnosperms.

4. **Naming the Structure**: The multicellular structure that develops from the megaspore is known as the female gametophyte. This structure is retained within the megasporangium.

5. **Function of the Female Gametophyte**: The female gametophyte contains archegonia, which are the female reproductive structures that produce eggs.

6. **Conclusion**: Therefore, the correct answer to the question is that the multicellular structure formed from the megaspore in gymnosperms is called the **female gametophyte**.