Attached crinoids are called
A) sea daisies.
B) sea lilies.
C) sea urchins.
D) basket stars.
E) feather stars.
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Q32: The madreporite in sea cucumbers is
A)absent.
B)internal.
C)external.
D)on the
Q33: If a brittle star is grasped by
Q34: The function of Aristotle's lantern is
A)protection.
B)digestion.
C)chewing.
D)locomotion.
E)regeneration.
Q35: Of the following structures found in sea
Q36: Some sea cucumbers have special tubules of
Q38: Sea cucumbers belong to the echinoderm class
A)Holothuroidea.
B)Crinoidea.
C)Asteroidea.
D)Ophiuroidea.
E)Concentricycloidea.
Q39: Sea urchins and sand dollars belong to
Q40: The primary circulatory medium in echinoids is
A)blood.
B)hemal
Q41: The nervous system of enteropneusts is _
Q42: The common name acorn worm is derived
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