How many embryo sacs are present in an ovule?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Terms**:
- An **embryo sac** is the female gametophyte in flowering plants, which develops from a megaspore mother cell (MMC).
- An **ovule** is a structure within the ovary of seed plants that contains the female germ cell.

2. **Formation of Embryo Sac**:
- The megaspore mother cell (MMC) undergoes meiosis to produce four haploid megaspores.
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