Which one of the following statements about the cytoskeleton is correct? which one of the following statements about the cytoskeleton is correct? intermediate filaments are wider than microtubules. a cell can adjust the lengths of most of its cytoskeletal elements as needed. cytoskeletal elements have a common diameter, but differ in type by their lengths. actin filaments are always longer than microtubules. the width of a cytoskeletal element is directly proportional to its length.

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?

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi

Which label correctly identifies what x represents in the concept map?