During early spring roots act as a (A)____ of food while buds of trees act as a (B)_____

Answer

To solve the question, we need to identify the roles of roots and buds in the context of food storage and production during early spring.

### Step-by-Step Solution:

1. **Understanding the Role of Roots**:
- In early spring, roots (especially modified roots like tubers) that have stored food during the winter begin to provide nutrients to the plant as conditions become favorable.
- Therefore, during this time, roots act as a **source** of food.

2. **Understanding the Role of Buds**:
- Buds of trees are the parts that will develop into new leaves and shoots. During early spring, buds are not yet photosynthesizing actively but rely on the stored food from the roots.
- As such, buds act as a **sink** because they are receiving and utilizing the food (sucrose) that is transported from the roots.

3. **Filling in the Blanks**:
- Based on the analysis:
- (A) **source** (for roots)
- (B) **sink** (for buds)

### Final Answer:
During early spring, roots act as a **source** of food while buds of trees act as a **sink**.

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