What is true for phylum echinodermata?
- AThey are triploblastic and have coelomic cavity.
- BThey have a peculiar water-driven tube system.
- CThey are exclusively free living marine animals.
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (d) More than one of the above
Explanation
Echinoderms (starfish, sea urchins, sea cucumbers) are triploblastic animals with a true coelom (body cavity). They have a special water vascular system that works their tube feet, and they are exclusively marine and free-living.
All three statements are true, so the answer is "More than one of the above".