However, "biologist" is a broad term. There are many specialized fields within biology, such as:

* Zoologists: Study animals

* Botanists: Study plants

* Microbiologists: Study microorganisms

* Ecologists: Study the interactions between organisms and their environment

* Geneticists: Study genes and heredity

* Evolutionary biologists: Study the origin and diversification of life

So, while a biologist is a scientist who studies life, the specific area of expertise can be much more specific.