Protists are very diverse, and many different classification schemes have been used to define relationships between the protists. traditionally, protists have been classified by their source of energy and nutrients, whereas newer classification schemes use mode of locomotion. how are amoeboids classified using both of these schemes?

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What element does susan b. anthony include in this passage to strengthen her argument?

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?