Triple fusion produces

Options

A. polar nucleus
B. secondary nucleus
C. zygotic nucleus
D. primary endosperm nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Double Fertilization:**
- In angiosperms (flowering plants), fertilization occurs through a process called double fertilization. This involves two distinct fusion events.

2. **Identifying the Two Types of Fusion:**
- The first fusion is between the male gamete (sperm) and the egg cell, which is known as syngamy. This results in the formation of a zygote (2N).
- The second fusion involves the fusion of the male gamete with the two polar nuclei present in the central cell of the ovule.

3. **Defining Triple Fusion:**
- Triple fusion specifically refers to the fusion of one male gamete with the two polar nuclei. This results in the formation of a triploid (3N) structure.

4. **Identifying the Product of Triple Fusion:**
- The product of triple fusion is known as the primary endosperm nucleus. This structure will eventually develop into the endosperm, which provides nourishment to the developing embryo.

5. **Evaluating the Options:**
- Option 1: Polar nucleus - Incorrect, as polar nuclei are not produced by triple fusion.
- Option 2: Secondary nucleus - Incorrect, as this is not formed during triple fusion.
- Option 3: Zygotic nucleus - Incorrect, as this is formed during the fertilization of the egg.
- Option 4: Primary endosperm nucleus - Correct, as this is the product of triple fusion.

6. **Conclusion:**
- Therefore, the correct answer is that triple fusion produces the primary endosperm nucleus.

**Final Answer:**
Triple fusion produces the primary endosperm nucleus.

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