Answer these three questions as soon as : ) 20 * how is lac operon regulated? * describe how most eukaryotic genes are controlled. * how is gene regulation in prokaryotes and eukaryotes similar? how is it different?

The first question...
lac operon is regulated by a specific protein called lactose.
the second question
the eukaryotic genes are controlled by the lactose proteins binding to the regulatory sites through the regulatory surface.
the third question
DIFFERENCE:prokaryotes regulation occurs in the cytoplasm while eukaryotes regulation occurs in the nucleus..
SIMILARITY:The transcription level of prokaryotes occurs in the cytoplasm and also the protein transcription level of the eukaryotes occurs in the cytoplasm

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.