Which best describes evolutionary theory? it is based on the idea that all life is related. it states that organisms have become less complex over time. it is not supported by observation or experimentation. it has been disproved several times since it was first proposed.

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

What type of competition exsist between two species. turtles and fish

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?