When any plant part undergoes senescence (A)_____ may be withdrawn from such regions and moved to the (B)_____

Answer

To solve the question, we need to fill in the blanks (A) and (B) regarding what happens when a plant part undergoes senescence.

### Step-by-Step Solution:

1. **Understanding Senescence**:
- Senescence in plants refers to the process of aging, where certain parts of the plant, such as leaves, begin to deteriorate and eventually die. This is a natural part of the plant's life cycle.

2. **Identifying What is Withdrawn**:
- During senescence, the plant withdraws essential substances from the aging parts. The most significant substances that are withdrawn are **nutrients**. These nutrients are crucial for the plant's growth and development.

3. **Determining Where the Nutrients are Moved**:
- The nutrients that are withdrawn from the senescing parts of the plant are typically redirected to the **growing parts** of the plant. These growing parts can include new leaves, stems, or roots that are actively developing and require additional nutrients to support their growth.

4. **Filling in the Blanks**:
- Therefore, the completed sentence would be: "When any plant part undergoes senescence, (A) **nutrients** may be withdrawn from such regions and moved to the (B) **growing parts**."

### Final Answer:
(A) nutrients
(B) growing parts

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