Explain why transpiration in higher plants is considered a necessary evil. 

Explain Cohesion-transpiration theory.

Water transpired is the water absorbed. Give suitable explanation.

Choose the correct answer from the alternatives given.
Hydroponics is a technique of growing:

Which of the following is not a deficiency symptom of minerals?

Assertion :Plants obtain molybdenum in the form of molybdate ions ($Mo{O}_4^{2+}$).
Reason :Molybdenum is a component of pollen germination, cll elongation abd cell differentiation.

In most of the plants, a part which is free from infection / diseases is ___________.

State whether the following statements are true or false.
Transfusion tissue is the substitute of lateral veins as it helps in the conduction of water.

Essential elements are