He is facing the problem of erectile dysfunction.

This sentence is written in the present tense.

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.

Let's participate in the election by using early voting.

Let's participate in the election by using early voting.

He is majoring in zoology at university.

An abnormality was observed in his anterior chamber.

I love biology.