My uncle is a famous zoologist.

He is an expert in astrophysics.

He is an expert in molecular biology.

I am majoring in developmental biology at university.

Biotechnology is a science that understands the mechanisms of life and utilizes them.

He is an expert in nuclear physics.

My brother is a famous biologist.

He is interested in paleozoology.

The Soviet Socialist Republics Union was a country that once existed.

The Czechoslovak Socialist Republic was once an existing country.