Siphonogamy is

Options

A. Fertilization assisted through pollen tube
B. Fusion between dissimilar gametes both of which are nonmotile
C. Fertilization of ovule thorugh funcile
D. Fertilization with the help of siphon system.

Answer

**Step-by-Step Solution:**

1. **Understanding Siphonogamy**: Siphonogamy is a type of fertilization process that occurs in seed plants. It involves the transfer of male gametes (sperm) to the female gamete (egg) through a specialized structure.

2. **Identifying the Structure**: In siphonogamy, the male gametes are transported to the egg via a pollen tube. This tube is formed after the pollen grain lands on the stigma of a flower.

3. **Characteristics of Gametes**: In this process, the male gamete is motile, meaning it can move, while the female gamete (the egg) is non-motile, meaning it does not move on its own.

4. **Analyzing the Options**:
- **Option A**: "Fertilization assisted through the pollen tube" - This accurately describes siphonogamy, as the pollen tube facilitates the transfer of male gametes to the egg.
- **Option B**: "Fusion between dissimilar gametes both of which are known in type" - This is incorrect because it does not specify the motility of the gametes.
- **Option C**: "Fertilization of ovule to funicle" - This does not relate to the process of siphonogamy.
- **Option D**: "Fertilization with the help of Sipon system" - This is misleading and not a recognized term in this context.

5. **Conclusion**: Based on the analysis, the correct answer is **Option A**, as it correctly describes the process of siphonogamy.

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