Which criterion can be used to measure the number of prokaryotes?

Match the following columns regarding the global species diversity of vertebrates and plants:

Column-$I$	Column-$II$
$(P)$ Birds	$(I)$ $12 \%$
$(Q)$ Mammals	$(II)$ $31 \%$
$(R)$ Amphibians	$(III)$ $23 \%$
$(S)$ Gymnosperms	$(IV)$ $32 \%$

How do ecologists estimate the total number of species present in the world?

Given below are some major species of organisms found in the Amazon rain forest.
$a$. Plants $b$. Mammals $c$. Birds
Considering their numbers present,choose the correct option showing the relationship among these organisms.

Which one of the following has the highest number of species in nature?

How many genetically diverse varieties of rice are there in India?