Question 10 of 15 A multicellular organism develops from a zygote that undergoes both cell
division and differentiation as it grows into an adult. What explains the fact
that cells are able to differentiate into adult cells with different structures and
functions even though they all have the same DNA?

A. The cell nucleus controls the expression of genes based on a pre-
determined sequence.

B. Cells randomly express different genes during development.

C. Chromosomes are keyed to be expressed only in some cells but
not in others.

D. External and internal cues trigger different genes to turn on and off
in different cells.

I think it’s D but I’m not sure