An ovule has generally 1 embryo sac.

Answer

**Step-by-Step Solution:**

1. **Understanding the Ovule**:
- An ovule is a structure found in seed plants that develops into a seed after fertilization. It is responsible for producing the female gametes (egg cells).

2. **Components of the Ovule**:
- The ovule consists of three main parts:
- **Integuments**: The outer covering of the ovule.
- **Nucellus**: The tissue that contains the megasporangium.
- **Female Gametophyte (Embryo Sac)**: This is the structure that develops from the megaspore and contains the egg cell.

3. **Formation of the Female Gametophyte**:
- The female gametophyte is formed from a single megaspore through a series of divisions. Initially, the megaspore undergoes reduction division (meiosis), resulting in the formation of four haploid megaspores, but typically only one survives and develops into the female gametophyte.

4. **Development of the Embryo Sac**:
- The surviving megaspore undergoes mitotic divisions, resulting in the formation of eight nuclei. These nuclei then arrange themselves into a specific structure known as the embryo sac.

5. **Structure of the Embryo Sac**:
- The embryo sac contains:
- **One egg cell**: Located at the micropylar end.
- **Two synergids**: Also at the micropylar end, which help in guiding the pollen tube.
- **Three antipodal cells**: Located at the opposite end of the embryo sac.
- **Two polar nuclei**: Located in the center, which fuse with the second male gamete during fertilization to form the endosperm.

6. **Conclusion**:
- Based on the structure and function of the ovule, it is clear that each ovule typically contains one embryo sac. Therefore, the statement "An ovule has generally 1 embryo sac" is correct.

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