Why do children look like a combination of their parents?

Because they are a combination of their parents.Each parent gives half their generic material to their children. The combination makes a unique combination of their parents genes. The scientific study of how traits are passed from parents to children is called genetics.

Cell division is important to single celled organisms because it allows the cells to reproduce. through cell division, cells make exact copies of themselves. when single celled organisms go through cell division, they make exact copies of themselves which is how they reproduce.

1) noble gases2) by increasing atomic number3) noble gases