Question

Which of the following is not true for echinoderms

• A. Exclusively marine
• B. No excretory organ
• C. Water vascular system
• D. Pseudocoelomate

Answer 1

The correct option is D

Pseudocoelomate

Echinoderms are characterized by radial symmetry, several arms.they all possess a very unique water vascular system. Echinoderm skeletons are made up of interlocking calcium carbonate plates and spines Habitat: These are exclusively marine., Grade of organization: organ system grade., Germ layer: triploblastic., Symmetry: Adults are radially symmetrical while the larvae are bilaterally symmetrical. Coelom: present ( coelomate)