The Aravalli hills are located in which state?

How many species in the world are facing the threat of extinction according to the $IUCN$ Red List $(2004)$?

Define/Explain: Endemic species.

Which of the following is considered a hot-spot of biodiversity in India?

In tropical forests like $..........$,the species of vascular plants are $10$ times more than those in temperate forests of the mid-west of the $U.S.A$.

The largely tropical ............. rain forest in South America has the greatest biodiversity on earth.