Zinc is a

A

(a) tracer element

B

(b) trace element

C

(c) macronutrient

D

(d) monomineral nutrient

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Zinc's Role in Plants:** - Zinc is an essential mineral for plants, playing a crucial role in various physiological processes, including photosynthesis and respiration. 2. **Analyzing the Options:** - **Option A: Tracer Element** - These are typically radioisotopes used in research to trace metabolic pathways. Zinc does not fit this definition. - **Option B: Trace Element** - This refers to elements required by plants in very small amounts (typically less than 100 ppm) for specific growth functions. Zinc fits this description as it is needed in low concentrations (15 to 60 ppm). - **Option C: Macronutrient** - Macronutrients are required in larger quantities for plant growth and development. Zinc is not classified as a macronutrient. - **Option D: Monomineral Nutrient** - This implies that zinc acts independently as a nutrient. However, zinc works in conjunction with other nutrients, making this option incorrect. 3. **Conclusion:** - After evaluating all options, the correct classification for zinc is as a **trace element** (Option B), as it is required in very low amounts for the essential functions in plants. **Final Answer:** Zinc is a **trace element**. ---
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