Which is currently the most supported theory about the future of the universe?

A. The universe could remain exactly as it is today.

B. The universe may continue to expand.

C. Stars could burn out, causing the universe to become dark and cold.

D. Gravity could pull galaxies back together, causing a reverse of the big bang.

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?

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.