Which of these statements is true? a; the title of the paper should convey the exact focus, meaning, and purpose of the paper. b. the title of the research paper is the thesis statement. c. a reliable web resource presents opinions as facts and is sponsored by advertisements. d. thesis statements, once written, cannot be revisited

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.