Biotechnology plays a very important role in the medical field.

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.

A sea otter is a very cute animal that lives in the sea.

In the old days, people were moved by the strength and beauty of the sea lion.

A sea lion is a type of marine animal, and it is very rare.