Question

3 differences and similarities between molluca and echinodermata

Answer 1

__MOLLUSCA__

* they have special exoskeleton called cuticle.

* open type circulation is present.

* respiration through ctenidia.

* excretory organ nephridia.

__ECHINODERMATA__

* they have ability to remarkable power of regeneration.

* vascular system is present help for respiration.

* open type circulation..

* excretory organ is absent.

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