Aresearcher engineers a lac operon on a plasmid, but inactivates all parts of the lac operator (laco) and the lac promoter, replacing them with the binding site for the lexa repressor (which acts in the sos response) and a promoter regulated by lexa. the plasmid is introduced into e. coli cells that have a lac operon with an inactive lacz gene. under what conditions will these transformed cells produce β-galactosidase?

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hygrometers and hair thermometers (often found as part of hygrometers/psychrometers) can be used to measure humidity. barometers are used to measure atmospheric pressure, while anemometers are used to measure wind speed. so the 2nd and 4th choices should be the correct answers.

the article must be ratified by three-fourths (38) of states within a proscribed deadline.

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answer; geography and region;