He is devoted to the study of neoplasms.

There are only inanimate objects in this room.

The use of bioweapons is prohibited by international law.

The study of nekton is an important part of marine biology.

My biological clock is disrupted, and I've been having sleepless nights.

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

He always proactively suggests new ideas.

He likes to take a walk in the park at dusk.

He is world-famous as a comparative linguist.

She is conducting research on the world's oldest profession.