How does a bacterial cell benefit by using the lac operon to control transcription

Which direction does the energy flow in this energy pyramid ?

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

During binary fission, what events must occur before the cell splits into two new cells?