42. In seed plants, which of the following is part of a pollen grain and has a function most like that of the seed coat?
(A) sporophyll
(B) sporopollenin
(C) stigma
(D) sporangium
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統計: A(1), B(1), C(0), D(1), E(0) #3056705
統計: A(1), B(1), C(0), D(1), E(0) #3056705