WHAT IS VERNALISATION?

Options

A. Flowering is induced only when plant is exposed to certain duration of photoperiod
B. Flowering is either quantitatively or qualitative dependent on exposour to low temperature
C. Presence of different kinds of structure in response to environment or phase of life
D. All changes that an organism goes through during its life cycle

Answer

### Step-by-Step Solution:

1. **Definition of Vernalization**: Vernalization is a physiological process in plants that promotes flowering by exposing them to a period of cold temperatures.

2. **Process of Vernalization**: During vernalization, plants are kept in a cold environment for a specific duration, typically a few weeks. This exposure to low temperatures triggers the flowering process.

3. **Relation to Seed Germination**: While vernalization is primarily associated with flowering, it can also influence seed germination. Seeds that undergo a cold treatment may germinate more effectively.

4. **Correct Answer Identification**: Among the options provided:
- The first option relates to photoperiod, which is not directly related to vernalization.
- The second option correctly states that flowering is dependent on exposure to low temperatures, making it the correct answer.
- The third option about different structures in response to the environment is not relevant.
- The fourth option regarding life cycle changes is also incorrect.

5. **Conclusion**: The correct answer is that flowering is either quantitatively or qualitatively dependent on exposure to low temperature.