Which of the following is known as the 'Lungs of the Planet'?

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

The species,though insignificant in number,determine the existence of many other species in a given ecosystem. Such species is known as

In India,tropical evergreen forests occur in

Within biological communities,some species are important in determining the ability of a large number of other species to persist in the community. Such species are called

What is a species called that is restricted to a specific geographical area?