Question

write a short note on echinodarmata???​

Answer 1

Answer:

These are exclusively marine animals.

1. The larval forms show bilateral symmetry and adult forms show radial symmetry.
2. They are triploblastic.
3. It exhibits organ system grade of organisation.
4. They have a true coelom.
5. The body is uniquely shaped.Any of numerous radially symmetrical marine invertebrates of the phylumEchinodermata, which includes the starfishes, sea urchins, and sea cucumbers, having an internal calcareous skeleton and often covered with spines
6. examples of an echinoderm include a starfish, a sand dollar, a brittle star, a sea urchin, and a sea cucumber.

Answer 2

Answer:

Echinodermata is originated from 2 greek words , echinos meaning hedgehog and derma means skin son it means organism having spines in their body. These are free living marine animals. They are triploblastic and have a coelomic cavity. They have water driven tube system for movement.