A system of unknown function in echinoderms,consisting of tissue strands enclosing unlined channels is the ______________ system.
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Q25: When a sea star feeds on a
Q26: The hemichordates are
A)bottom-dwelling marine animals.
B)deuterostomes.
C)fairly worldwide in
Q27: One of the principal functions of the
Q28: Acorn worms
A)belong to the phylum HemichordatA.
B)have a
Q29: The Class _ have internal respiratory trees
Q32: The common name for the enteropneusts is
Q33: Acornworms
A)are usually found in deep water zones.
B)do
Q35: It is generally accepted the ancestral deuterstome
Q56: The larvae of echinoderms have _ symmetry.
Q58: On the inner end of each tube
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