Which of the following has the least pollen viability?

Options

A. Cereals like wheat and rice
B. Members of Rosaceae
C. Memebers of Leguminoseae
D. Members of Solanaceae

Answer

To determine which of the following has the least pollen viability, we need to analyze the pollen viability of each option provided: cereals like wheat and rice, members of the Rosaceae family, members of the Leguminaceae family, and members of the Solanaceae family.

### Step-by-Step Solution:

1. **Understanding Pollen Viability**:
- Pollen viability refers to the ability of pollen grains to germinate and fertilize an ovule. It is a crucial factor in plant reproduction.

2. **Evaluating the Options**:
- **Cereals (Wheat and Rice)**: The pollen viability of cereals like wheat and rice is notably low, with a viability period of only about 30 minutes.
- **Members of Rosaceae**: This family includes plants like roses and strawberries, which typically have a pollen viability that can last for several months.
- **Members of Leguminaceae**: This family includes legumes such as beans and peas, which also exhibit a pollen viability lasting several months.
- **Members of Solanaceae**: This family includes plants like tomatoes and potatoes, which also have a relatively high pollen viability, lasting for several months.

3. **Comparing Viabilities**:
- Based on the information gathered, we can compare the pollen viability:
- Cereals (Wheat and Rice): 30 minutes
- Rosaceae: Few months
- Leguminaceae: Few months
- Solanaceae: Few months

4. **Conclusion**:
- The option with the least pollen viability is clearly the cereals like wheat and rice, as they have a viability of only 30 minutes, which is significantly lower than the others.

### Final Answer:
Cereals like wheat and rice have the least pollen viability.

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