Which of the following best describes what occurs as the density of a QS bacterial population increases? Choose 1 Choose 1 (Choice A) A The concentration of QS signaling molecules decreases, eventually triggering a change in gene expression throughout the bacterial population. (Choice B) B The concentration of QS signaling molecules increases, eventually triggering a change in gene expression in a few members of the bacterial population. (Choice C) C The concentration of QS signaling molecules decreases, eventually triggering a change in gene expression in a few members of the bacterial population. (Choice D) D The concentration of QS signaling molecules increases, eventually triggering a change in gene expression throughout the bacterial population.

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?

When mendel crossed a true-breeding short plant with a true-breeding tall plant all the offspring were tall. which term describes the gene for tallnes?

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.