Pedicellariae are
A) larval sea stars.
B) the mouth-like openings into the center of the bottom of the sea star.
C) structures linking the madreporite and the ring canal.
D) small pincer-like projections clustered on the skin of a sea star which serve to keep it clean of parasites and aquatic growth.
E) soft and delicate projections of the coelomic cavity covered with epidermis.
Correct Answer:
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Q1: Arrow worm reproduction and development involves
A)separate male
Q2: Treating sea urchin eggs with hypertonic seawater
Q3: Arrow-worms feed
A)on plankton and small fish.
B)by retracting
Q4: Within basic research,sea urchins have been a
Q5: The ossicles are penetrated by a meshwork
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
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