How has the discovery of dna affected the classification of protists (check all that apply) 1)many scientists wants to get rid of the kingdom protista 2) some organisms have been moved out of the kingdom protista 3) classification is generally easier and less complex 4)it has been determined that protists share a common ancestor 5) some organisms have been moved into the kingdom protista

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.