Long ribbon like pollen grains are seen in some

Options

A. aquatic plants
B. wind pollinated grasses
C. gymnosperms
D. bird pollinated flowers

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of plants that have long ribbon-like pollen grains.

2. **Analyzing the Options**:
- **Aquatic Plants**: These plants often exhibit hydrophily, where water acts as the pollinating agent. The pollen grains in these plants are typically long and ribbon-like, which helps them to move with water currents.
- **Wind Pollinated Grasses**: These plants are characterized by anemophily, where wind is the pollinating agent. Their pollen grains are usually lightweight, non-sticky, and not ribbon-like.
- **Gymnosperms**: Similar to wind-pollinated grasses, gymnosperms also rely on wind for pollination. Their pollen grains are generally lightweight and not long or ribbon-like.
- **Bird Pollinated Flowers**: These flowers are known as ornithophilous flowers. They tend to have brightly colored, heavy pollen grains that are not ribbon-like, as they need to be picked up by birds.

3. **Identifying the Correct Answer**: Based on the analysis, the only option that describes plants with long ribbon-like pollen grains is **Aquatic Plants**.

4. **Conclusion**: Therefore, the correct answer to the question is **Aquatic Plants**.

---