The phenomenon which prevents precocious reproductive development late in growing season and enables the plant to have sufficient times to reach maturity, is :-

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a phenomenon that prevents premature reproductive development in plants during the late growing season. This is crucial for ensuring that plants have enough time to mature before they reproduce.

2. **Analyzing the Options**:
- **Photoperiodism**: This refers to the response of plants to the relative lengths of light and dark periods. It influences flowering but does not specifically prevent premature development.
- **Vernalization**: This is the process by which a period of cold temperature is required to induce flowering in certain plants. It helps in delaying flowering until conditions are favorable, thus allowing the plant to mature properly.
- **Senescence**: This is the process of aging in plants, leading to the eventual death of plant parts. It does not prevent premature development.
- **Abscission**: This refers to the shedding of leaves, flowers, or fruits from a plant. It is not related to the timing of flowering or maturity.

3. **Identifying the Correct Answer**: Among the options, **vernalization** is the only phenomenon that specifically prevents premature reproductive development late in the growing season and allows plants to mature adequately.

4. **Conclusion**: Therefore, the correct answer to the question is **vernalization**.

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