Which two phrases most likely explain how the rock shown here formed? D A. Cooling of volcanic lava on Earth's surface
O B. Sedimentation of layers at the bottom of a body of water
O C. Small grains of sand getting pressed together over time

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?

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn

How many autosomes are in this human karyotype? how many sex chromosomes?