What is the scientist that studies plant and animal life?

The scientist who studies plant and animal life is called a biologist.

However, depending on the specific focus, there are other terms that might be used:

* Botanist: Studies plants.

* Zoologist: Studies animals.

* Ecologist: Studies the interactions between organisms and their environment.

* Marine biologist: Studies organisms in the ocean.

* Entomologist: Studies insects.

* Ornithologist: Studies birds.

* Ichthyologist: Studies fish.

So, while "biologist" is a general term, there are many different specialties within biology.