The Question is from neet-botany mineral-nutrition , and it was created by the author B VENKAT

Question

Which of the following is not caused by deficiency of mineral?

B VENKAT · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [B]
## CONCEPT FRAMEWORK
**Primary Concept**: Mineral deficiency and its effects on plant growth.
**Related Topics**: Plant nutrition, plant hormones, photosynthesis, plant morphology.
**Prerequisites**: Basic knowledge of plant physiology and mineral nutrition.
## SOLUTION PATHWAY
**Given Information**:
   - The question asks for the option NOT caused by mineral deficiency.
**Method & Steps**:
1. **Analyze Chlorosis:** Chlorosis is the yellowing of leaves due to a lack of chlorophyll, often caused by mineral deficiencies (like iron or magnesium).
    Reasoning: Chlorophyll synthesis requires minerals.
    Formula/Rule: N/A
2. **Analyze Etiolation:** Etiolation is the process of plants growing pale and elongated due to a lack of light. Mineral deficiency doesn't directly cause this.
    Reasoning: Etiolation is a response to low light, not mineral shortage.
    Formula/Rule: N/A
3. **Analyze Shortening of Internodes:** Mineral deficiencies can lead to stunted growth, including shorter internodes.
    Reasoning: Minerals are essential for cell division and elongation.
    Formula/Rule: N/A
4. **Analyze Necrosis:** Necrosis is cell death, which can be a consequence of severe mineral deficiency.
    Reasoning: Severe mineral deficiency disrupts cell metabolism.
    Formula/Rule: N/A
5. **Conclusion:** Based on the analysis, Etiolation is not caused by mineral deficiency.
    Result: Etiolation is the correct answer.
    Verification: Etiolation is a light-dependent response.
## OPTION ANALYSIS
[A] :x: Chlorosis is a direct effect of mineral deficiency.
[B] ✓: Etiolation is caused by the absence of light, not mineral deficiency.
[C] :x: Shortening of internodes can result from mineral deficiencies.
[D] :x: Necrosis is a symptom of severe mineral deficiency.
## LEARNING AIDS
**Common Mistakes**:
1. [Error 1]: Confusing light responses with mineral deficiency responses.
  [How to avoid]: Understanding the different triggers for plant responses.
2. [Error 2]: Assuming all plant growth problems are due to mineral deficiencies.
   [How to avoid]: Recognizing other environmental factors.
**Quick Tips**:
1. [Helpful shortcut]: Remember that chlorosis and necrosis are direct symptoms of nutrient imbalance.
2. [Memory aid]: Think of 'etiolation' as 'etiolated'= 'pale' = 'light' issues.

B VENKAT · Answer

Chlorosis

B VENKAT · Answer

The correct Option is "Etiolation"

B VENKAT · Answer

Shortening of intermodes

B VENKAT · Answer

Necrosis

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