The animal kingdom is incredibly diverse, and it is said that there are still species that have not been discovered.

The animal kingdom is known for its diversity and complexity.

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

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

He is majoring in zoology at university.

She has zoophobia, and runs away as soon as she sees dogs or cats.

Rabbits are herbivores and mainly eat grass.

A lion is a type of carnivore.

He is majoring in zoology at university.

Mammals can maintain a constant body temperature.