Acow and a frog have similar bone structures in their forelimbs. both have phalanges, radius, ulna, and humerus bones. however, the cow and frog are animals with very different life cycles from each other. which most likely describes why the body structures of these animals are so similar? a. both have undergone similar mutations. b. both descended from a common ancestor. c. both reacted similarly to environmental pressures. d. both spread out from the same geographical region

Based on the evidence in the excerpt above, describe in your own words what it would have been like for a person to enter a meat processing plant in the united states

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 test would show positive results for orange juice