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.

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統計: A(12), B(158), C(16), D(12), E(6) #938839

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#2997547
一顆受精卵從輸卵管到子宮後,會經由分裂小...
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#6531914
同卵雙胞胎(identical twin...
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