He is a world-renowned zoologist.

Astrobiology is a very interesting field of study.

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 nuclear physics.

I am very interested in marine biology.

He is an expert in paleozoology and has a deep knowledge about the ecology of dinosaurs.

He has a deep interest in paleozoology.

My major is chemical engineering.