Which animal phylum lacks a network of nerve cells for gathering information from the environment?
A)Porifera - sponges
B)Cnidaria - jellyfish, sea anenomes
C)Platyhelminthes -- flatworms
D)Nematoda - roundworms

Question

Quizplus · Accepted Answer

Porifera, or sponges, lack a nervous system and do not have a network of nerve cells. They rely on the flow of water through their bodies to gather information about their environment.

Which Animal Phylum Lacks a Network of Nerve Cells for Gathering