In which of the following phyla does the adult show radial symmetry,while the larva shows bilateral symmetry?

Which phylum does an animal belong to that exhibits bilateral symmetry in the larval stage and pentamerous radial symmetry in the adult stage?

Triploblastic,coelomate,complete digestive system and radial symmetry is found in$-$

Which of the following phyla consists exclusively of marine animals?

Role of the water vascular system in Echinoderms is :
$A.$ Respiration and Locomotion
$B.$ Excretion and Locomotion
$C.$ Capture and transport of food
$D.$ Digestion and Respiration
$E.$ Digestion and Excretion
Choose the correct answer from the options given below :

In Echinodermata,the water vascular system is derived from which of the following?