Ambulacral grooves are absent in

Ambulacral grroves are absent in

Ambulacral grroves are absent in

Consider the following characters: (a) Aboral surface bears anus and madreporite. (b) Ambulacral grooves are absent. (c) Respiration by dermal branchiae and tube feet.(d) Arms are branched.(e) Pedicellariae are present Which of the following options gives the correct description of Asterias?

Deltoid groove is present in

Number of ambulacral areas in Sea Cucumber is

Number of ambulacral areas in Sea Cucumber is

Number of ambulacral areas in Sea Cucumber is

Name the phylum in which ambulacral system is present. What is its function ?