Which of the following statements is true reg | vedclass

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(D) The phylum $Echinodermata$ is characterized by the following features:$1$. They possess an endoskeleton of calcareous ossicles,which is why they a

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All are correct

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(D) The phylum $Echinodermata$ is characterized by the following features:$1$. They possess an endoskeleton of calcareous ossicles,which is why they are named $Echinodermata$ (spiny-skinned).$2$. They are exclusively marine organisms.$3$. $A$ unique feature of this phylum is the presence of a water vascular system,which helps in locomotion,capture and transport of food,and respiration.Since all the given statements are correct,the correct option is $D$.

Which of the following statements is true regarding $Echinodermata$?

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