The three major crops that contribute most to global food grain production are $........$.

Mulching helps in

Which of the following has been recently used for increasing the productivity of super milch cows?

How many times did the Green Revolution increase the food supply?

What is the primary source of food and fodder?

In an experiment,freshly hatched larvae of an insect (Khapra beetle) were reared on a basal diet (complete diet without cholesterol) with increasing amounts of cholesterol. Results obtained are shown in the given graph.
The graph indicates: