Macronutrients like carbon,hydrogen and oxygen are obtained mainly from

  • A
    $CO_2$
  • B
    $H_2O$
  • C
    Both $(a)$ and $(b)$
  • D
    Soil

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Similar Questions

$A$: Some mineral nutrients are essential.
$R$: They can be synthesized by the plants.

'All elements that are present in a plant need not be essential to its survival.' Comment.

An element must be considered essential,when
$I.$ the element is necessary for supporting normal growth and reproduction of the plants
$II.$ the deficiency of that particular element can not be met by supplying some other element
$III.$ the element is directly involved in the metabolism of the plants. Choose the correct pair

An essential element is that which

Which of the following elements has not been proven to be essential in plants?

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