When a sea star feeds on a clam,it inserts its _____________ between the two valves.
A) madreporite
B) stomach
C) ampulla
D) pyloric ceca
Correct Answer:
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Q20: Class Asteroidea
A)have pentaradial symmetry.
B)feeds on clams.
C)feeds on
Q21: Of the echinoderms,regeneration and autotomy are most
Q22: Of the two classes of Hemichordata,a crown
Q26: The hemichordates are
A)bottom-dwelling marine animals.
B)deuterostomes.
C)fairly worldwide in
Q27: One of the principal functions of the
Q28: Acorn worms
A)belong to the phylum HemichordatA.
B)have a
Q29: The Class _ have internal respiratory trees
Q30: A system of unknown function in echinoderms,consisting
Q63: The respiratory tree of sea cucumbers opens
Q78: The basic five arms of crinoids are
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