What can help a scientist identify any object in a group of objects? a. the objects size b. the objects color c. the objects characteristics d. the objects shape HURRY TAKING A UNIT TEST (i only have 10 points so helppp)

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.