問題詳情

40. A “complete digestive tract” differs from a gastrovascular cavity in that only the complete tract
(A)has specialized compartments.
(B)permits extracellular digestion.
(C)allows elimination of undigested wastes.
(D) has teeth and tentacles to help with ingestion.
(E)uses its surface area for nutrient absorption.

參考答案

答案:A
難度:適中0.555556
統計:A(20),B(3),C(4),D(1),E(3)

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