The dust bowl refers to . a. a football championship game b. a period of drought during the civil war c. years of dust storms in the Midwest in the 1930’s d. a large flood plain in Oklahoma Please select the best answer from the choices provided A B C D

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.