Pollen grains of rice and wheat lose their viability in ____ Minutes of their release

Options

A. 30 min
B. 60 min
C. 70 min
D. 90 min

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Viability**: Pollen grains are crucial for the fertilization process in flowering plants. However, they do not remain viable indefinitely after being released.

2. **Identifying the Plants**: The question specifically mentions rice and wheat. It is important to note that different plants have different durations for which their pollen grains remain viable.

3. **General Viability Duration**: Pollen viability can vary widely among plant species. Some pollen grains can remain viable for years, while others may lose viability in just a few minutes.

4. **Specific Duration for Rice and Wheat**: For rice and wheat, research indicates that their pollen grains typically lose viability relatively quickly.

5. **Conclusion from Options**: Given the options provided (30 minutes, 60 minutes, 70 minutes, and 90 minutes), the correct answer is that pollen grains of rice and wheat lose their viability in **30 minutes** after their release.

6. **Final Answer**: Therefore, the answer to the question is **30 minutes**.

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