Why does the zygote begin to divide only after the division of primary Endosperm cell (PEC)?

Explanation

### Step-by-Step Solution:

1. **Understanding the Zygote and Primary Endosperm Cell (PEC)**:
- The zygote is the fertilized egg that will develop into an embryo.
- The primary endosperm cell (PEC) is formed after fertilization and will develop into the endosperm, which is crucial for providing nutrition to the developing embryo.

2. **Role of Endosperm**:
- The endosperm serves as a food reserve for the embryo during its early development.
...