Cephalization, the clustering of neurons and interneurons in the anterior part of the animal, is apparent in
A) Hydra.
B) cnidarians.
C) Planaria.
D) sea stars.
E) invertebrate animals with radial symmetry.

Question

Quizplus · Accepted Answer

Cephalization is the clustering of neurons and interneurons in the anterior part of the animal. Planaria exhibit cephalization, which allows them to respond to stimuli in a coordinated way. Hydra, cnidarians, sea stars, and invertebrate animals with radial symmetry do not exhibit prominent cephalization.

Cephalization, the Clustering of Neurons and Interneurons in the Anterior