What do the variables in the Hardy-Weinberg equation represent? frequency of the homozygous recessive genotype -->

frequency of the heterozygous recessive genotype -->

frequency of the recessive allele -->

frequency of the dominant allele -->

frequency of the homozygous dominant genotype -->

p

p2

q

q2

2pq

The answer is

frequency of the homozygous recessive genotype --> q^2

frequency of the heterozygous recessive genotype --> 2pq

frequency of the recessive allele --> q

frequency of the dominant allele --> p

frequency of the homozygous dominant genotype --> p^2

Hope this will help for all

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.