問題詳情
43. Among the invertebrates, arthropods are unique in possessing
(A) a notochord.
(B) open circulation.
(C) segmented bodies.
(D) ventral nerve cords.
(E) jointed appendages.
(A) a notochord.
(B) open circulation.
(C) segmented bodies.
(D) ventral nerve cords.
(E) jointed appendages.
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