He is an expert in biophysics.

I am majoring in biophysics at university.

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.

Cytogenetics is a science that studies the structure and function of chromosomes and genes.

He is an expert in nuclear physics.