He is an expert in ethology, and his research is highly regarded worldwide.

I am majoring in developmental biology at university.

He is an expert in algebraic geometry.

He is an expert in topology.

I am very interested in sociolinguistics.

He is majoring in oenology.

He has a deep interest in parapsychology.

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

She has a deep interest in astrology.

Cell biology is the study of the structure and function of cells, which are the basic units of life.