In an experiment , two long day plants belonging to the same species are selected . In plant A , all leaves are covered in such a way that no light can reach them but the floral buds are exposed and light can reach them. In plant B, all floral buds are covered in such a way that no light can reach them. Both these plants are now subjected to light for a duration greater the their critical photoperiod. Which of these results will be obtained ?

Options

A. Flowering will occur in plant A but not in plant B
B. Flowering will occur in plant B but not in plant A
C. Flowering will occur in both plant A as well as plant B
D. Flowering will not occur in both plant A as well as plant B

Answer

To solve the question, we need to analyze the effects of light exposure on two long-day plants (Plant A and Plant B) and how it influences their flowering based on the principles of photoperiodism.

### Step-by-Step Solution:

1. **Understanding Long-Day Plants**:
- Long-day plants require a longer duration of light (greater than their critical photoperiod) to induce flowering. They typically flower when the day length exceeds a certain threshold.

**Hint**: Remember that long-day plants need more light exposure to trigger flowering.

2. **Analyzing Plant A**:
- In Plant A, all leaves are covered, preventing light from reaching them, but the floral buds are exposed to light. Since the floral buds are receiving light and the duration is greater than the critical photoperiod, Plant A can still initiate flowering.

**Hint**: Focus on where the light is reaching; the floral buds are crucial for flowering.

3. **Analyzing Plant B**:
- In Plant B, the floral buds are covered, meaning they do not receive any light. However, the leaves are exposed to light. The leaves are responsible for photosynthesis and producing the necessary hormones for flowering, but since the floral buds are not exposed to light, Plant B will not flower.

**Hint**: Consider the role of floral buds in flowering; they need light exposure to trigger the flowering process.

4. **Conclusion**:
- Based on the analysis, Plant A will flower because its floral buds are exposed to light, while Plant B will not flower because its floral buds are covered and do not receive light. Therefore, the correct result is that flowering will occur in Plant A but not in Plant B.

**Hint**: Summarize the key points: Plant A flowers, Plant B does not.

### Final Answer:
- Flowering will occur in Plant A but not in Plant B.