In the developing ovule of most of the Angiosperms , megaspore mother cell is situated within the nucellus

Options

A. towards the micropyle
B. towards the chalaza
C. In the centre , equidistant from micropyle and chalaza
D. towards the raphe

Answer

To solve the question regarding the location of the megaspore mother cell in the developing ovule of most angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Ovule**:
- The ovule consists of several parts, including the nucellus, integuments, micropyle, chalaza, and raphe. The nucellus is the tissue that surrounds the megaspore mother cell.

2. **Identifying the Megaspore Mother Cell**:
- The megaspore mother cell (also known as the megasporangium) is responsible for producing megaspores through the process of meiosis.

3. **Location of the Megaspore Mother Cell**:
- In most angiosperms, the megaspore mother cell is located within the nucellus. It is typically positioned towards the micropyle end of the ovule.

4. **Understanding the Role of the Micropyle**:
- The micropyle is the opening through which the pollen tube enters to deliver male gametes. This positioning is crucial for fertilization.

5. **Megasporogenesis Process**:
- The process of megasporogenesis involves the megaspore mother cell undergoing meiosis to produce four megaspores. Out of these, usually three degenerate, leaving one functional megaspore that develops into the female gametophyte (embryo sac).

6. **Conclusion**:
- Therefore, the correct answer to the question is that the megaspore mother cell is situated within the nucellus, specifically towards the micropyle end.

### Final Answer:
The megaspore mother cell is situated within the nucellus towards the micropyle end in the developing ovule of most angiosperms.

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