The orientation of a sea star is
A) a dorsal mouth and a ventral spiny surface facing upward.
B) an oral mouth facing downward and an aboral spiny surface.
C) an anterior mouth and a posterior spiny surface.
D) a dorsal oral mouth and a ventral-aboral spiny surface.
E) a ventral mouth and an anti-ventral spiny surface.
Correct Answer:
Verified
Q7: The Chaetognaths
A)have radial symmetry.
B)feed on clams.
C)are small
Q8: The common name for chaetognaths is
A)arrow worms.
B)acorn
Q9: Tube feet run along the _ groove
Q10: Arrow worm anatomy
A)lacks any coelom.
B)lacks a complete
Q11: The most active of all echinoderms are
Q13: The calcareous plates found underneath the epidermis
Q14: The fossil record of echinoderms
A)is sparse with
Q15: Echinoderms are
A)mostly pelagic or free-swimming in open
Q16: Unique characteristics of echinoderms include all of
Q17: Water enters the water vascular system of
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