How many species have been identified till $2004$ in the world?
More than $1.6$ million
More than $1.4$ million
More than $1.5$ million
More than $1.7$ million
What is the importance of species diversity to the ecosystem and various hypothesis related to it?
Which of the following group represents minimum species diversity among vertebrates?
In global biodiversity of plants, the
Given below is the representation of the extent of global diversity of invertebrates. What groups the four portions $(A-D)$ represent respectively?