The outer skin most of the crustaceans are made up of a carbohydrate. This carbohydrate is

Rutherford's scattering experiment proved the presence of

When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy state, they emit light, which we can observe in

Blood pressure may be increased by the excessive secretion of

The concept of 'Green House Gases' was postulated by

The Particulate Matter (PM-10) exhaled from the polluted atmosphere is often filtered out during the process of

The ordinary and maximum tolerance limit of sound by human being is

According to Marx, the source of value is

The pollutants which move downward with percolating groundwater are called

Lungs are located in the

Transcription means synthesis of

Hydrochloric acid is secreted by the cells lining the

Emulsification is

 Which one of the following is the smallest endocrine gland in human body ?

Yellow spots on citrus leaves is due to the deficiency of: