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Mineral Nutrition — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYMineral Nutrition1 Mark
MCQ
Number of essential elements in plants is:
  • A
    $10$
  • ✓
    $17$
  • C
    $20$
  • D
    $22$
✓

Answer

Correct option: B.
$17$
There are about $17$ mineral elements which are considered as essential for the plants.
They can be grouped into two categories: micronutrients and macronutrients.Macronutrients are present in plants in easily detectable quantities and are $10$ in number.
They include$-$ carbon, oxygen, hydrogen, nitrogen, iron, potassium, calcium, phosphorus, magnesium and sulphur.
They are generally required to build up the plant body, regulate osmotic concentration and take part in biochemical reactions.Micronutrients are present in plants in minute quantities and are $7$ in number.
They include chlorine, manganese, boron, zinc, copper, molybdenum and nickel.
They are generally required in the functioning of enzymes , as cofactors or metal activators.

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