The nervous system of enteropneusts is __________ in origin.
A) enterocoelous
B) ectodermal
C) mesodermal
D) endodermal
E) schizocoelous
Correct Answer:
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Q36: Some sea cucumbers have special tubules of
Q37: Attached crinoids are called
A)sea daisies.
B)sea lilies.
C)sea urchins.
D)basket
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
Q42: The common name acorn worm is derived
Q43: The circulatory system of enteropneusts sends blood
Q44: The ciliated larva of an acorn worm
Q45: The water vascular system of echinoderms carries
Q46: Ambulacrarians and chordates are united into the
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