The run-off of which of these can result in cultural eutrophication?

a. carbon and sulfur
b. sediment
c. sulfur and dihydrogen monoxide
d. nitrogen and phosphorus

Unsaturated fatty acids that have been changed to saturated fatty acids are called

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?

According to this food web which of the following would be considered primary consumers