Frugivorous birds are found in large numbers in tropical forests mainly because of:

Read the following statements:
$(A)$ India has a greater ecosystem diversity than Norway.
$(B)$ According to the $IUCN$ $(2004)$,the total number of plant and animal species described so far is slightly more than $1.5$ million.

Match Column-$I$ with Column-$II$.

Column-$I$	Column-$II$
$(A)$ Narrowly utilitarian argument	$(i)$ Conserving biodiversity for major ecosystem services
$(B)$ Broadly utilitarian argument	$(ii)$ Every species has an intrinsic value and moral duty to pass our biological legacy in good order to future generations
$(C)$ Ethical argument	$(iii)$ Receiving benefits like food,medicine and industrial products

In the tropics,the rate of extinction is

The state of Gujarat has river,desert,forest,and lake ecosystems,thus exhibiting a diversity of life. Which measure do you use to denote total diversity in such a case?

What is the term used to describe the variety in size,shape,structure,lifestyle,and other aspects of organisms living in different regions?