Some plants like sugarbeet and cabbage required low temperature for flowering. This phenomenon is called

Options

A. Photoperiodism
B. Parthenocarpy
C. Vernalisation
D. Abscission

Answer

To solve the question regarding the phenomenon that some plants like sugar beet and cabbage require low temperature for flowering, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about a specific phenomenon related to flowering in certain plants that require low temperatures.

2. **Analyzing the Options**:
- **Option 1: Photoperiodism**: This term refers to how plants respond to the lengths of day and night. It is not related to temperature but rather to light duration. Therefore, this option is incorrect.

- **Option 2: Parthenocarpy**: This phenomenon involves the production of fruits without fertilization, resulting in seedless fruits. It does not involve temperature requirements for flowering, making this option incorrect as well.

- **Option 3: Vernalization**: This is the process where certain plants require exposure to low temperatures for a specific period to induce flowering. Since sugar beet and cabbage are examples of plants that need low temperatures for flowering, this option is likely correct.

- **Option 4: Abscission**: This term refers to the process of shedding old leaves, flowers, or fruits from a plant. It is unrelated to flowering or temperature requirements, so this option is also incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Vernalization**, as it specifically describes the requirement of low temperatures for flowering in certain plants.

### Final Answer:
The phenomenon is called **Vernalization**.

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