Solution:
Aquatic invertebrates with exoskeleton such as molluscs and crustaceans are called shellfish.
It is estimated that more than 70 per cent of the world livestock population is in India and China. But the contribution to the world farm produce is only 25 per cent (low productivity).
Milk yield is primarily dependent on the quality of breeds. Bird flu in chicken is caused by H5N1 virus.
