In E. coli the lac operon is used to control the expression of the genes involved in the use and metabolism of lactose. Under which condition would the lac structural genes be expressed

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: