Which of the following is TRUE of a morphogen?
A) It is a signaling molecule required for cell-to-cell contact within the embryo.
B) It is a signaling molecule that induces the differentiation of cells within the embryo.
C) It is a signaling molecule that induces blastulation of the developing embryo.
D) It is a signaling molecule that induces implantation of the embryo into the uterus of mammals.
E) It is a signaling molecule that separates out cytoplasmic factors to their respective cells within the developing embryo.
Correct Answer:
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