Question

It is possible to determine whether an element is essential by observing growth of plants

• A. On soil form which the particular element is removed
• B. On soil in which only the particular element is present
• C. On an inert medium to which solution of only the particular element is added
• D. On an inert medium to which a nutrient solution excluding that particular element is added

Answer 1

The correct option is D On an inert medium to which a nutrient solution excluding that particular element is added

An inert medium to which nutrient solution excluding the particular element is added, the medium will contain all the nutrients essential for the plant growth except the nutrient whose effect is being studied. Any adverse effect on plant growth seen in such cases will be the result of the absence of the particular nutrient and hence, essentiality of the element can be determined.

So, the correct answer is 'On an inert medium to which a nutrient solution excluding that particular element is added'