There is a Citrus nobilis tree in my garden.

Protists are being studied in a branch of biology.

Arthropods are a large group of animals that include insects, spiders, shrimp, and crabs.

Carbohydrates are important as a source of energy.

He is majoring in zoology at university.

I love biology.

The ejecta from volcanoes help to elucidate the geological history of the Earth.

This structure has existed for centuries.

He is an expert in mineralogy.

He is an expert in paleontology and is researching dinosaurs.