Despite their simple body structure, nematodes have surprisingly complex ecosystems.

My uncle is a famous zoologist.

Various plants and animals inhabit this park.

Protozoans are single-celled organisms.

Cnidarians are a type of marine life, including jellyfish and corals.

The ecosystem of zoobenthos is an important field of study in marine biology.

A tardigrade can survive in extreme environments.

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

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

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