The country whose tropical rain forests possess the greatest biodiversity on earth is

The medicinal plant $Rauwolfia$ $vomitoria$ produces which chemical?

Which of the following regions is $NOT$ a biodiversity hotspot?

The Rivet Popper hypothesis assumes the $A$ to be an aeroplane and the $B$ to be the rivets,joining all parts together. Here,$A$ and $B$ refer to:

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

Read the following statements:
$(A)$ India has a greater ecosystem diversity than Norway.
$(B)$ According to the $IUCN$ $(2004)$,the total number of plant and animal species described so far is slightly more than $1.5$ million.