What is the best explanation for why scientists involved in biotechnology sometimes insert the dna of one organism into a second organism?
to increase meiosis
to make more efficient cell organelles
to create a new species
to cause the second organism to produce proteins

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?

Several billion years ago which gas was the least prevailant in the atmosphere

Which are reasons cells undergo cell division?