Antidiuretic hormone and oxytocin are neurohormones. b. The posterior pituitary originates from neural tissue, but the anterior pituitary has its origin elsewhere. c. More than one statement is correct. d. Neurons from the hypothalamus extend directly into the anterior pituitary. e. The hypothalamus and the posterior pituitary are connected by the portal blood vessels.

Secondary succession would most likely be taking place in a(n)

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?

Pl which diagram illustrates prophase?