Which describes a homogeneous mixture?
a. a solvent dissolves in a solute to make a solution.
b. a solute dissolves in a solvent to make a solution.
c. a solution dissolves in a solute to make a solvent.
d. a solution dissolves in a solvent to make a solute.

C and d are wrong b/c solution is what u are making 
solvent is what dissolves the solute, like water is the universal solvent
so the answer is b

B. A solute dissolves in a solvent to make a solution

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.