Question

Animals in the same phylum may have different nervous system structures. For example, octopuses have large, complex brains while clams have a simple _____ network.

Answer 1

The Answer would probably be ring -like

Answer 2

The answer is ring - like

Clams have the ganglia that form a ring around esophagus and that is why this network is called ring - like.

hope this answer correct (^^)..