Abstract algebra is a field of mathematics that studies algebraic structures in an abstract way.

I am majoring in econometrics at university.

He is an expert in biophysics.

I am majoring in biophysics at university.

Molecular biology is a field of study that understands life phenomena at the molecular level.

Biotechnology plays a very important role in the medical field.

I am majoring in developmental biology at university.

He is an expert in sociolinguistics.

I am very interested in sociolinguistics.

Chemotransmitters play an important role in the transmission of information between nerve cells.