Which of the following pair is incorrectly matched?

Options

A. Tomato - Day neutral plant
B. Wheat- short day plant
C. Henbane - Long day plant
D. Sugarcane - Short day plant

Answer

To determine which of the given pairs is incorrectly matched, we need to analyze the classifications of the plants based on their photoperiodic responses.

### Step-by-Step Solution:

1. **Understand Photoperiodism**:
- Photoperiodism is the physiological response of plants to the relative lengths of light and darkness in a 24-hour cycle. It is crucial for flowering in many plants.

2. **Identify Types of Photoperiodic Plants**:
- **Long Day Plants**: Require longer daylight periods (more than 12 hours) to flower. Examples include wheat, barley, and red clover.
- **Short Day Plants**: Require shorter daylight periods (less than 12 hours) to flower. Examples include rice, sugarcane, and tobacco.
- **Day Neutral Plants**: Do not depend on the length of daylight to flower. They can flower regardless of light duration. Examples include tomatoes and cucumbers.

3. **Analyze Each Option**:
- **Tomato - Day Neutral Plant**: Correctly matched. Tomatoes are indeed day neutral.
- **Wheat - Short Day Plant**: Incorrectly matched. Wheat is a long day plant, not a short day plant.
- **Henbane - Long Day Plant**: Correctly matched. Henbane is classified as a long day plant.
- **Sugarcane - Short Day Plant**: Correctly matched. Sugarcane is a short day plant.

4. **Conclusion**:
- The pair that is incorrectly matched is **Wheat - Short Day Plant**. Wheat is a long day plant.

### Final Answer:
The incorrectly matched pair is **Wheat - Short Day Plant**.

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