Can all molecules diffuse through all cell membranes explain

No, some molecules are too large to fit through the pores of the cellular membrane. The cellular membrane is "semi-permeable", meaning that it lets only certain substances cross the membrane. This is determined by the size of the substance, the type of charge, and the lipid solubility of the substances.

The basic repeating unit of nucleic acids are known as nucleotides. a nucleotide consists of three distinct chemical groups.

Answer : romans built laws to manage the pollution which was lead by smoke produced by the factories.

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.