1.

‘All elements that are present in a plant need not be essential to Its survival’. Comment.

Answer»

The criteria for essentiality of an element are given below: 

  • The element must be absolutely necessary for supporting normal growth and reproduction. In the absence of the element the plants do not complete their life cycle or set the seeds.
  • The requirement of the element must be specific and not replaceable by another element. In other words, deficiency of any one element cannot be met by supplying some other element.
  • The element must be directly involved in, the metabolism of the plant.


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