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

Panspermia, an idea that is still a favourite for some astronomers, means:

Western Ghats have a large number of plants and animal species that are not found anywhere else. Which of the following term is used to notify such species?

Which of the following are true about the taxonomical aid 'key'?

(a) Keys are based on the similarities and dissimilarities.

(b) Key is analytical in nature.

(c) Keys are based on the contrasting characters in pair called couplet.

(d) Same key can be used for all taxonomic categories.

(e) Each statement in the key is called Lead.

Choose the most appropriate answer from the options given below: