Which animal group does not have tissues?

A) nematodes
B) sponges
C) echinoderms
D) flatworms
E) cnidarians

Tissues

Groups of similar cells that perform a specific function within an organism, making up organs and other parts of the body.

Sponges

Simple aquatic animals belonging to the phylum Porifera, characterized by porous bodies through which water flows.

Echinoderms

A phylum of marine animals including sea stars, sea urchins, and sand dollars, characterized by radial symmetry and a unique water vascular system.