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1. |
Embryonic stem cells are also used for generation of transgenic organisms. They are obtained from _______ of a developing ________ |
A. | trophoectoderm, gastrula |
B. | trophoectoderm, blastula |
C. | inner cell mass, blastula |
D. | inner cell mass, gastrula |
Answer» D. inner cell mass, gastrula | |