Which part of the plant is used as 'saffron'?

The use of which of the following regional languages was popularised by the Bhakti leader, Shankaradeva?

Earth received heat from the sun is known as:

The word Biosphere refers to:

A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from the blood extra:

An ant can see the objects all around it due to the presence of: