Plants which daily require shorter period of darkness for flowering are called

Options

A. Short day plants
B. Long day plants
C. Normal day plants
D. Ephemeral plants

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the type of plants that require shorter periods of darkness for flowering. This indicates that we need to differentiate between plants based on their light and dark requirements for flowering.

2. **Identifying Plant Categories**: There are two main categories of plants based on their light requirements:
- **Short Day Plants**: These plants flower when the day length is shorter than a certain critical length. They require longer periods of darkness.
- **Long Day Plants**: These plants flower when the day length is longer than a certain critical length. They require shorter periods of darkness and longer periods of light.

3. **Analyzing the Options**:
- **Short Day Plants**: Require longer darkness, so they are not the answer.
- **Long Day Plants**: Require shorter periods of darkness, making them a potential answer.
- **Normal Day Plants**: This term is not commonly used in botany.
- **Ephemeral Plants**: These are characterized by short life cycles, not specifically related to light/dark requirements.

4. **Conclusion**: Based on the definitions and requirements of the plants, the correct answer to the question is **Long Day Plants**. These plants require shorter periods of darkness for flowering.

5. **Final Answer**: The plants which daily require shorter periods of darkness for flowering are called **Long Day Plants**.

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