Question

3 specialization of cells occurs when the embryo— a enters the interphase section of mitosis. b develops past the blastocyst stage. c reaches the interphase g₁ and g₂ sections. d reaches the s phase.

Explanation:

Cell specialization in embryos occurs after the blastocyst stage when cells begin to differentiate into various cell - types and tissues. Interphase (G1, S, G2) is part of the cell - cycle and not directly related to the start of cell specialization in embryos.

Answer:

B. develops past the blastocyst stage.