A unique characteristic of echinoderms is
A) the endoskeleton of plates or ossicles.
B) the water-vascular system.
C) pedicellariae.
D) all of these
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Q6: Hemichordates show relationships to both the echinoderms
Q7: The ambulacral grooves of asteroids are closed.
Q8: The function of the papulae in the
Q9: The ophiuroids have no
A)pedicellariae.
B)papulae.
C)anus.
D)all of these
Q10: The five pairs of bursae in brittle
Q12: The fossil record indicates crinoids are more
Q13: Sea stars
A)live in brackish waters.
B)have bilateral symmetry.
C)use
Q14: The echinoids
A)have five long,slender arms.
B)are enclosed in
Q15: Echinoderms
A)are clearly related to cnidarians because of
Q16: Echinoderms have the ability to osmoregulate regardless
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