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.

He is an expert in primatology and is engaged in the study of gorilla behavior.