How many genetically different varieties of mango occur in India (in $,000$)?

India has much of its land area in the $\underline {i}$ and possesses more than $\underline {ii}$ species of birds.

According to the $IUCN$ Red List $(2004)$, $784$ species have become extinct in the last $500$ years. Match the extinct species given in Column-$I$ with their respective numbers in Column-$II$.

Column-$I$	Column-$II$
$(P)$ Vertebrates	$(I)$ $338$
$(Q)$ Invertebrates	$(II)$ $87$
$(R)$ Plants	$(III)$ $359$

According to the world population, India is placed at which position?

What are the approximate percentage proportions of plant and animal species on Earth?

According to Robert May,the global species diversity is about: