How many essential mineral elements have been discovered yet?

$A$ : All the diverse mineral elements found in plants are not essential for them.
$R$ : Some plants accumulate heavy and toxic minerals such as gold and selenium from the soil.

Which element is a structural component of amino acids,proteins,hormones,chlorophyll,and most vitamins?

Describe essential minerals on the basis of their diverse functions.

Nitrogen is a critical element of the ecosystem because it is

In which of the following,all three are macronutrients?