試題詳解

43. Development must occur in the order of which of the following sequences?
(A)morula  cleavage  gastrula  blastula
(B)gastrula  morula  blastula  cleavage
(C)cleavage  blastula  gastrula  morula 　　　
(D) cleavage  morula  blastula  gastrula
(E)cleavage  gastrula  morula  blastula