Give the characteristics features of Echinodermata,
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Solution
The characteristics features of Echinodermata are following
I. Spikes present on skin. 2. Free-living marine animals. 3. Triploblastic and have a coelomic cavity. 4. It has a peculiar water-driven tube system called a water vascular system that they use for making movement around 5. It has a hard calcium carbonate structure that is used as a skeleton. Example: Starfish, sea-urchin.