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Chief sink of mineral elements are...

Chief sink of mineral elements are

A

bark

B

ripe fruits

C

senescent leaves

D

lateral meristems

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The correct Answer is:
To determine the chief sink of mineral elements in plants, we need to analyze the options provided and understand the concept of sinks in plant nutrition. ### Step-by-Step Solution: 1. **Understanding the Concept of Sinks**: - In plant biology, a "sink" refers to a part of the plant where nutrients and minerals are utilized for growth. This is typically where active cell division and growth occur. 2. **Analyzing the Options**: - **A. Bark**: Bark is the outer protective layer of the plant. It does not actively grow or divide cells; therefore, it is not a chief sink. - **B. Ripe Fruits**: Ripe fruits have already completed their growth phase. While they may store nutrients, they do not actively utilize minerals for growth, making them an unsuitable choice for a chief sink. - **C. Senescent Leaves**: Senescent leaves are aging leaves that are in the process of dying. They do not contribute to growth and therefore cannot be considered a chief sink. - **D. Lateral Meristem**: Lateral meristems are regions of active cell division that contribute to the growth in thickness of the plant. They are involved in the formation of new tissues and are thus a significant site for mineral utilization. 3. **Identifying the Correct Answer**: - Among the options, the only one that represents an area of active growth and mineral utilization is **D. Lateral Meristem**. This is where rapid cell division occurs, making it the chief sink for mineral elements. ### Conclusion: The chief sink of mineral elements is **D. Lateral Meristem**. ---
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