Protozoans are single-celled organisms.

As the name suggests, chordates are a group of animals that have a notochord.

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

He is spending a lot of time on experimental research.

He is a person of strong vanity who reads self-improvement books.

He thoroughly researched the history of that nation.

He is a famous composer.

He is a famous lyricist who has produced many hit songs.

He is a very excellent performer.

He dreams of becoming a famous cartoonist.