He phenomenon of melting point depression is used in every-day life during the winter whenever roads are salted. ice and salt are mixed together to lower the melting point of water, making roads less slippery until colder temperatures. the precise composition of salt and ice to yield the lowest melting point temperature is with 23 wt% salt. this value is called the blank 1. fill in the blank, read surrounding text. point for a mixture. (be sure to spell your answer correctly.)

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?

Someone me with this: a mineral' is determined by its actomic structure.

How do ratio scale and diagrammatic scale work