Buds of trees act as sink in

Options

A. early spring
B. late spring
C. winter
D. autumn

Answer

**Step-by-Step Solution:**

1. **Understanding the Concept of Source and Sink:**
- In plants, the source refers to parts that produce food through photosynthesis (like leaves), while the sink refers to parts that consume or store this food (like buds, roots, and fruits).

2. **Identifying the Role of Buds:**
- Buds can be considered as sinks because they require nutrients and energy to grow and develop. Even though they are green and capable of photosynthesis, they still rely on stored sugars for their growth.

3. **Analyzing the Seasons:**
- We need to determine during which season the buds of trees act as sinks. The options given are early spring, late spring, winter, and autumn.

4. **Considering Early Spring:**
- In early spring, trees start to mobilize stored sugars from their roots to support the growth of new buds. This is when buds are actively developing and require energy, making them act as sinks.

5. **Eliminating Other Seasons:**
- In late spring, the buds have already developed, and while they may still require nutrients, they are not primarily acting as sinks anymore.
- During winter, the trees are generally dormant, and there is minimal growth, so buds do not act as sinks.
- In autumn, the focus is on the storage of nutrients rather than the active growth of buds.

6. **Conclusion:**
- Based on the analysis, the correct answer is that buds of trees act as sinks in early spring.

**Final Answer: Early Spring**

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