List the post-fertilization events in angiosperms.

Explanation

### Step-by-Step Solution

1. **Fertilization**: The process begins with the fusion of male and female gametes, resulting in the formation of a zygote.

2. **Formation of Primary Endosperm Nucleus**: After fertilization, the primary endosperm nucleus is formed, which is crucial for the next steps.

3. **Endosperm Development**: The primary endosperm nucleus undergoes division to form the endosperm, which serves as the nutritive tissue for the developing embryo.

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