the sponge.
a) sedentary life b) predators, but not prey c) concentration of sensory structures at the anterior end d) a sessile existence e) a backbone ANS: C
"Cephalization" means that the animal has a defined "head" region in which there is a lot of nervous tissue (such as the brain in humans). Sponges are not cephalized because they do not have defined...
Yes. They have extensive cephalization. They have a brain and eyes.
Yes, frogs have heads.