44. In humans, identical twins are produced by the separation of cells during
(A)organogenesis.
(B)blastomere cleavage.
(C)gastrulation.
(D) pattern formation.
(E)the development of notochord.
答案:登入後查看
統計: A(12), B(158), C(16), D(12), E(6) #938839
統計: A(12), B(158), C(16), D(12), E(6) #938839