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

Doctors may try to stimulate spermatogenesis by prescribing the person, an estrogen receptor blocker, which leads to the stimulation of the hypothalamus and pituitary gland in the brain. This stimulation results in the generation of FSH and LH hormone production.

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