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Plant Growth and Mineral Nutrition — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPlant Growth and Mineral Nutrition3 Marks
Question
Explain the active absorption of minerals.
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Answer

  1. Plants absorb minerals from the soil with their root system.
  2. Minerals are absorbed from the soil in the form of charged particles, positively charged cations and negatively charged anions.
  3. The absorption of minerals against the concentration gradient which requires expenditure of metabolic energy is called active absorption.
  4. The ATP energy derived from respiration in root cells is utilized for active absorption.
  5. Ions get accumulated in the root hair against the concentration gradient.
  6. These ions pass into cortical cells and finally reach xylem of roots.
  7. Along with the water these minerals are carried to other parts of plant.

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