More conservative and scientifically sound estimate made by Robert May places the global species diversity at about

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

In India,nearly $45,000$ species of . . . . . . and twice as many of . . . . . . have been recorded.

Match the organisms on Earth with their appropriate number of species.

List-$I$	List-$II$
$(a)$ Species of ants	$(1)$ $28,000$
$(b)$ Species of beetles	$(2)$ $20,000$
$(c)$ Species of fish	$(3)$ $3,00,000$

What is the estimated total number of species on Earth?

Select the correct option regarding biodiversity estimates.