What characteristic is unique to echinoderms?
A) a lack of segmentation
B) a water vascular system
C) suction-cup-like feet
D) larvae with bilateral symmetry

Question

Quizplus · Accepted Answer

Echinoderms have a unique water vascular system that is used for movement, feeding, and respiration. This system consists of a network of fluid-filled tubes that connect to suction-cup-like feet. A lack of segmentation is not unique to echinoderms as many animals, such as sponges and cnidarians, also lack segmentation. Suction-cup-like feet are found in other animals, such as cephalopods. While echinoderm larvae do have bilateral symmetry, this characteristic is not unique to echinoderms as many animals go through a similar developmental process.

What Characteristic Is Unique to Echinoderms