Why is purification of water and nutrient salts so important in studies involving mineral nutrition using hydroponics?

Why it is important to study antigen-antibody interaction?

Why the cell is very important for us?

Why is it easier for you to float in salt water than in fresh water?

Assertion: The technique of growing plants in a nutrient solution is known as hydroponics Reason: Hydroponics is used for commercial production of vegetables such as tomato, seedless cucumber and lettuce.

Study of morphology is important in taxonomy. Why?