What are the two types of optical medium?

What are the two types of catalysis?

What are the types of lens?

What are the types of spectrum?

What are two types of cells ?

What are the 4 types of pollution?

What are the two types of nitrogenous bases found in DNA? Name them.

name two types of wetland.

Name the two types of slime moulds.

What are the main two types of chromatography techniques based on differential adsorption ? Write a detail discussion.

what are the different types of pneumonia?