38. Which unique feature is found in the phylum Cnidaria, such as jellyfish and sea anemones?
(A) exoskeleton made of chitin
(B) vascular tissue for nutrient transport
(C) notochord during some stage of their life cycle
(D) nematocysts for defense and capturing prey
(E) segmented body plan

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統計： A(1), B(0), C(0), D(48), E(2) #3224819

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