Fusion of male gamete with dipoloid secondary nucleus produces _________ and it known as ________ (respectively).

Options

A. PEN , Triple fuslon
B. PEN , Syngamy
C. Zygote , Syngamy
D. Zygote , Triple fusion

Answer

To answer the question, "Fusion of male gamete with diploid secondary nucleus produces _________ and it is known as ________ (respectively)," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- The male gamete in flowering plants (angiosperms) is the pollen grain, which contains sperm cells.
- The diploid secondary nucleus is formed from the fusion of two polar nuclei within the embryo sac.

2. **Identifying the Process**:
- In angiosperms, the process involves the fusion of the male gamete (sperm) with the diploid secondary nucleus (formed by the fusion of two polar nuclei).
- This fusion results in the formation of a triploid cell.

3. **Result of the Fusion**:
- The fusion of the male gamete with the diploid secondary nucleus produces the primary endosperm nucleus (PEN).
- The ploidy of this primary endosperm nucleus is triploid (3N).

4. **Naming the Process**:
- The process of fusion between the male gamete and the diploid secondary nucleus is known as "triple fusion."

5. **Final Answer**:
- Therefore, the answer to the question is:
- Fusion of male gamete with diploid secondary nucleus produces **primary endosperm nucleus (PEN)** and it is known as **triple fusion**.

### Final Answer:
- **Primary endosperm nucleus (PEN)** and **triple fusion**.