By the end of the eighth week, the embryo, which is only 1 inch long and weighs just 1 gram, __________.

Name: By the end of the eighth week, the embryo, which is only 1 inch long and weighs just 1 gram, __________.
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By the end of the eighth week, the embryo has developed to a point where it can respond to touch, indicating the beginning of sensory development. The other options (B, C, D) are behaviors that develop later in fetal development.

By the End of the Eighth Week, the Embryo, Which