It is best to say that efficient plumbing a. reduces water pollution by using less water b. reduces water pollution by using cleaner water c. increases water pollution by using more water

multiply 2kg by latent heat of vap

f is prop to m1xm2 double m1 double force

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).