Sorghum contains toxic substance which is known as

An area is considered drought stricken, when the annual rainfall is less than 

Sugarcane (Saccharum officinarum) family Gramineae (Poaceae) is widely grown crop in India. Most serious disease of sugarcane is :

Which of the following seed is genetically most pure?

The principal pathway of water translocation in angiosperms is

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. 

Term Ecosystem was given by____

Water harvesting is defined as

Father of green revolution in India 

Which cotton species is recognized as "American cotton" or "Upland cotton" and has an allelotetraploid chromosome number?