That person is my friend.

I saw many animals at the zoo.

There are various types of plants in my garden.

He is an expert in toxicology and conducts many studies.

Protists are single-celled organisms that live in water.

I love biology.

Mineral oil is often used in the manufacture of cosmetics and pharmaceuticals.

He is majoring in mineralogy at university.

Vertebrates are organisms whose part of the skeleton is composed of a spine.

Wild animals are part of nature, and we should protect them.