Generally, well-nourished and healthy children begin puberty children who have experienced serious health problems or inadequate nutrition.

A. later than
B. at the same time as
C. earlier than
D. either much earlier or much later than

Which action occurs in the third stage of cell division? a. the nuclear material of cell is copied exactly. b. the nuclear membrane disappears. c. the cell forms two nuclei d. the nuclear material separates, with half moving to either side of the cell.