Parthenoapogamy involves

Options

A. Fusion of two gametic nuclei
B. Fusion of three gametes
C. Fusion of two vegetative nuclei
D. Development of new plant from a single gametophytic cell.

Answer

**Step-by-Step Solution:**

1. **Understanding Parthenoapogamy**: Parthenoapogamy is a type of asexual reproduction that combines elements of parthenogenesis (development of an organism from an unfertilized ovum) and apogamy (development of an embryo without fertilization).

2. **Analyzing the Options**:
- **Option 1: Fusion of two gametic nuclei**: This option refers to sexual reproduction, which involves the fusion of gametes. Since parthenoapogamy is a form of asexual reproduction, this option is incorrect.

- **Option 2: Fusion of three gametes**: This option also implies sexual reproduction, which is not applicable in the context of parthenoapogamy. Therefore, this option is also incorrect.

- **Option 3: Fusion of two vegetative nuclei**: This option correctly describes parthenoapogamy as it involves the fusion of vegetative nuclei rather than gametes. This is the correct answer.

- **Option 4: Development of new plants from a single gametophytic cell**: This option is incorrect because gametophytic cells lead to the formation of gametes, which are not involved in asexual reproduction.

3. **Conclusion**: The correct answer is the third option, which states that parthenoapogamy involves the fusion of two vegetative nuclei.

**Final Answer**: The correct option is the fusion of two vegetative nuclei.

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