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

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

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

Animal experiments are necessary for the advancement of science, but there are also ethical issues.

He is learning about the handling of experimental animals.

A lion is a type of carnivore.

He and his brother look so alike, they seem like the very same person.

A tardigrade can survive in extreme environments.

Ruminants have the characteristic of re-chewing food after swallowing it once.

My pet is a dog.