The study of properties and method of biological systems found in nature and use of this knowledge in mechanical world is known as –

The average salinity of sea water is

Poultry is a foreign breed of bird with a capacity to lay more eggs.

Washing soda is the common name for

The gases used in different types of welding would include

Reading of a barometer going down is an indication of

Common name of Ascaris is?

How many types of lavaks are based on color?