The Nervous System of Enteropneusts Is __________ in Origin

Q52: The major secretory and absorptive structures of

Q53: In sea stars,the _ surface is the

Q54: Echinoderms from this class have been over

Q55: The primary circulatory medium in echinoids is<br>A)blood.<br>B)hemal

Q56: Sea urchins and sand dollars belong to

Q57: As deuterostomes,the echinoderms and hemichordates share all

Q58: Which is the only class of echinoderms

Q59: Sea lilies and feather stars belong to

Q60: The function of Aristotle's lantern is<br>A)protection.<br>B)digestion.<br>C)chewing.<br>D)locomotion.<br>E)regeneration.

Q61: _ function in cleaning the body surface