The second fertilization in angiosperms is known as

Options

A. generative fertilization
B. vegetative fertilization
C. there is no second fertilization
D. secondary fertilization

Answer

**Step-by-Step Solution:**

1. **Understanding Fertilization in Angiosperms:**
- In angiosperms, fertilization involves the fusion of male and female gametes. This process is unique because it includes two fertilization events.

2. **Identifying the First Fertilization:**
- The first fertilization event involves the fusion of one male gamete with the egg cell (ovum), resulting in the formation of a zygote. This process is referred to as syngamy.

3. **Identifying the Second Fertilization:**
- The second fertilization event occurs when the second male gamete fuses with the two polar nuclei present in the embryo sac. This fusion results in the formation of a triploid nucleus.

4. **Naming the Result of the Second Fertilization:**
- The triploid nucleus formed from the fusion of the second male gamete and the polar nuclei is known as the primary endosperm nucleus (PEN).

5. **Conclusion:**
- The process that includes both fertilization events is termed double fertilization. The specific name for the second fertilization in angiosperms, which leads to the formation of the primary endosperm nucleus, is **vegetative fertilization**.

**Final Answer:**
The second fertilization in angiosperms is known as **vegetative fertilization**.

---