4 Multicellular animals have some mechanism to control cell mass that we do not understand; for example, salamanders of different ploidies are the same size such that a haploid, a diploid, and a pentaploid organism are about the same size. However, a yeast cell differs in size according to ploidy, such that a diploid yeast cell is about half the size of a tetraploid yeast cell. Given these observations, explain why yeast and salamanders are not so different.