Spot out the zone of our country considered as the hot spot of biodiversity and regarded as the "Cradle of Speciation".

The biodiversity increases when one moves from the pioneer to the climax stage. What could be the explanation?

Provide the definitions/explanations for the following:
$(i)$ In-situ conservation
$(ii)$ Biodiversity

The number and types of organisms present on Earth constitute ...... .

In India,temperate evergreen vegetation occurs mostly in

Given below are pie diagrams $I$,$II$ and $III$ related to the proportionate number of species of major taxa of invertebrates,vertebrates and plants respectively. Critically study and fill in the blanks $A, B, C$ and $D$.