Which of the following statements is not correct ?

Options

A. Pollen grains are released from anthers at 2-called stage.
B. Sporogenous cell directly behaves as the magaspore mother cell
C. Magaspore divides twice to form an eight nucleate embryo sac.
D. Egg and synergids always lie near the micropylar end of ovule

Explanation

To determine which statement is not correct regarding megaspores and the development of the female gametophyte in flowering plants, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Understanding Megaspores**:
- A megaspore is a type of spore that develops into the female gametophyte. It is produced in the ovule of flowering plants.

2. **Megaspore Development**:
- The megaspore undergoes three nuclear mitotic divisions.
- The first division produces a two-nucleate structure, known as the embryo sac.

3. **Formation of Nuclei**:
- After the first division, the two nuclei migrate to opposite ends of the embryo sac.
- The two nuclei then undergo two more mitotic divisions, resulting in a total of eight nuclei.

4. **Arrangement of Nuclei**:
- Out of the eight nuclei formed, three nuclei at the micropilar end become the egg apparatus (which includes the egg cell and two synergids).
- The remaining three nuclei at the chalazal end form the antipodal cells.
- The two central nuclei fuse to form the central cell, which contains the polar nuclei.

5. **Evaluating the Statements**:
- **Statement 1**: "Pollen grains are released from the amphidermis." - This is correct.
- **Statement 2**: "Sporogeneous cell directly behaves as megaspore mother cells." - This is also correct.
- **Statement 3**: "Megaspore divide twice to form an 8 nucleate embryo sac." - This is incorrect; it actually undergoes three mitotic divisions.
- **Statement 4**: "Synergids always lie near the micropilar end of the ovule." - This is correct.

6. **Conclusion**:
- The statement that is not correct is: "Megaspore divide twice to form an 8 nucleate embryo sac." This statement is incorrect because the megaspore undergoes three mitotic divisions to form the eight nuclei.

### Final Answer:
The incorrect statement is: "Megaspore divide twice to form an 8 nucleate embryo sac."