The image shows flat sedimentary rock layers in the foreground and angled sedimentary rock layers in the background.
according to the principle of original horizontality, what most likely happened to the rock layers in the background?
they cracked at an angle.
they were deposited at an angle.
they were deposited vertically and then shifted by a geologic event.
they were deposited horizontally and then shifted by a geologic event.

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?

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

What is the next step in the process after a substrate enters the active site of an enzyme