What is the basic unit of speed?

The Base event in protein synthesis produces a ……………….

Gunpowder consists of a mixture of : 

An organism which can monitor air pollution is –  

Octane number is a measure of the quality of 

The colour of the ocean appears to be blue because the sunlight falling on it is-

After wound or cut in body blood coagulates through:

Why does a Blackboard appear black in colour?