Which of the Following Organisms Demonstrates Cephalization

Question

Which of the following organisms demonstrates cephalization?
A) jellies
B) hydras
C) planarians
D) sea stars

Accepted Answer

Cephalization is the development of a head where sensory organs and nerve cells are concentrated. Planarians (flatworms) exhibit cephalization, unlike jellies, hydras, and sea stars, which do not have a well-defined head region.