Identify $X, Y$ and $Z$ from figure:
$X-Y-Y$
Crustacean - Fishes - Birds
Mollusca -Mammals - Reptiles
Insects - Birds - Amphibians
Molluscs - Amphibians - Mosses
Give scientific reasons : Species diversity of plants is much less then that of animals.
Which of the following expanded forms of the following acronyms is correct?
According to Robert May, the global species diversity Is about
Which one of the following have the highest number of species in nature?
Give scientific reasons : It is difficult to estimate global diversity for prokaryotes.