The currents of water (containing food) that pass through a sponge are maintained by
A) ganglia.
B) collar cells.
C) medusae.
D) the osculum.
E) a water-vascular system.
Correct Answer:
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Q19: All animals with tissues have
A) radial symmetry.
B)
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A) echinoderms.
B) chordates.
C)
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A) Echinodermata.
B)
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