If you were to repeat the Meselson Stahl experiments, but rather than use N15 and N14, you use P32 and P31, how would the resulting DNA bands present in the CsCl gradient change

Which of the following is not an example of conflict between related individuals?

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?