Arrow worm reproduction and development involves
A) separate male and female individuals.
B) a larval stage that lacks sense organs.
C) a coelom but there is no peritoneum lining.
D) spiral and unequal cleavage.
E) a coelom formed from the archenteron extending backward,not from pinched off coelomic sacs.
Correct Answer:
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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
Q6: Pedicellariae are
A)larval sea stars.
B)the mouth-like openings into
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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