Question

Which of the following characteristic feature is unique to echinoderms?

• A. They are triploblastic
• B. They have true coelom
• C. They have spiny skin
• D. They are found only in marine condition.

Answer 1

The correct option is C

They have spiny skin

All Echinoderms have a spiny skin. This is one of the most important features of these organisms and it is uniform throughout the group.