試題詳解

21. If organisms a, b, and c belong to the same class but to different orders and if organisms c, d, and e belong to the same order but to different families, which of the following pairs of organisms would be expected to show the greatest degree of structural homology?
(A) a and d
(B) b and c
(C) b and d
(D) d and e
(E) a and e