Invasive species can have a major impact on the natural environment.

He came down the stairs.

She has zoophobia, so she can't go to the zoo.

Despite their simple body structure, nematodes have surprisingly complex ecosystems.

My uncle is a famous zoologist.

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 believes in zoolatry and lives a life in harmony with nature.

He is an expert in nuclear physics.