What percentage of the living species of animals is threatened?

What percentage of original radiactive atom is left after four half lives:

Name two endangered animal species of India.

What are threatened species? Name three categories of threatened species.

What criteria should one use in categorising a species as threatened?

Complete the missing links: The protective similarity of one species of animal to another in apperance is known as……….

What are objectives of animal breeding?

What are eurythermic species?