Within each ovule a haploid embuyo sac usually containing 8 nuclei is formed.

Answer

### Step-by-Step Solution:

1. **Understanding the Ovule Structure**:
- Each ovule in flowering plants contains a haploid structure known as the embryo sac. This is crucial for the process of fertilization.

2. **Components of the Embryo Sac**:
- The embryo sac typically contains a total of 8 nuclei, which are organized into specific cells:
- **Antipodal Cells**: There are three antipodal cells located at the top of the embryo sac. Each of these cells is haploid (N).
- **Polar Nuclei**: In the center of the embryo sac, there are two polar nuclei. These are also haploid (N), but since there are two, they are often represented as 2N in terms of their contribution to the overall structure.
- **Egg Cell**: The egg cell is located centrally and is also haploid (N).
- **Synergids**: There are two synergid cells that flank the egg cell, and these are also haploid (N).

3. **Counting the Nuclei**:
- To find the total number of nuclei in the embryo sac, we add them up:
- Antipodal cells: 3 (N)
- Polar nuclei: 2 (N)
- Egg cell: 1 (N)
- Synergids: 2 (N)
- Total = 3 (from antipodal) + 2 (from polar nuclei) + 1 (from egg) + 2 (from synergids) = 8 nuclei.

4. **Conclusion**:
- The statement that within each ovule a haploid embryo sac usually containing 8 nuclei is formed is TRUE. This is because the total count of nuclei in the embryo sac adds up to 8, confirming the accuracy of the statement.