What is the surgery that involves trimming excess prostate tissue in order to treat urinary problems that are caused by an enlarged prostate?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.

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?

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.