observe the cartoon on the next page. Identify each simple machine represented in the machine. your choices will be:lever, inclined plane, pulley, wedge, screw,,wheel and axel, and pendulum.(not really a simple machine, but will be ok in this worksheet)

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.