How do ecologists estimate the total number o | vedclass

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(B) The diversity of living organisms present on the Earth is vast. According to an estimate by researchers,it is about $7$ million.Ecologists calcula

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By using statistical comparisons of species richness between well-studied groups in temperate and tropical regions.

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(B) The diversity of living organisms present on the Earth is vast. According to an estimate by researchers,it is about $7$ million.Ecologists calculate the total number of species present in the world by using statistical comparisons between the species richness of well-studied groups of insects in temperate and tropical regions.These ratios are then extrapolated to other groups of plants and animals to estimate the total species richness present on the Earth.

Column-$I$	Column-$II$
$(P)$ Biodiversity in India	$(1) \; 45,000$
$(Q)$ Plant species in India	$(2)$ Insects
$(R)$ Most species rich group	$(3)$ Fungi
	$(4) \; 8.1\%$

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

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Match the following:

Column-$I$ Column-$II$

$(P)$ Biodiversity in India $(1) \; 45,000$

$(Q)$ Plant species in India $(2)$ Insects

$(R)$ Most species rich group $(3)$ Fungi

$(4) \; 8.1\%$

The diagram represents the global biodiversity of major plant taxa. Identify $X$ and $Y$ from the given diagram.

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