Toxicity of Elements and Soil Pollution · NCERT Biology

Excess boron in soil primarily affects plants by:

  1. Reducing enzyme activity
  2. Enhancing sugar transport
  3. Increasing leaf expansion
  4. Improving root nodulation
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Correct answer: Reducing enzyme activity

Boron toxicity interferes with enzyme function and cell metabolism. This leads to leaf damage and reduced growth.

Difficulty: Medium Question 8 of 20

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