Low temperature is required by some plants for

Options

A. Flowering
B. Seed germination and sprouting of buds
C. Both A and B
D. Appearance of new foliage.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks why some plants require low temperatures. We need to identify the specific processes that are influenced by low temperatures.

2. **Identifying Key Processes**:
- **Vernalization**: This is a process where certain plants require a period of cold temperatures to induce flowering. This is crucial for plants like cabbage and other biennials that need to go through a cold period before they can flower.
- **Seed Germination**: Some seeds also require low temperatures to germinate effectively. Cold temperatures can help maintain moisture levels in the soil, which is essential for the germination process.

3. **Evaluating the Options**:
- Option A: Vernalization (correct, as it relates to flowering).
- Option B: Seed germination (also correct, as some seeds require low temperatures to germinate).
- Option C: Both A and B (this option combines the previous two and is correct).
- Option D: None of the above (incorrect, as we have established that both A and B are correct).

4. **Conclusion**: The correct answer is Option C, which states that low temperature is required by some plants for both flowering (through vernalization) and seed germination.

### Final Answer:
Low temperature is required by some plants for both flowering (a process known as vernalization) and seed germination. Therefore, the correct answer is Option C: Both A and B.

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