Which sentence most needs to be revised because its description is too vague? A. We hiked two miles uphill in the blooming forest today.
B. We sprinted back and forth in the stuffy high school gym.
C. We had to walk up several flights of stairs to get there.
D. We stretched and then slowly jogged once around the track.

In a series of experiments, hershey and chase radioactively labeled dna and protein in viruses and then used labeled viruses to infect bacteria. hershey and chase's experiments definitively showed that a. dna and not protein is the genetic material. b. dna and protein work together as a cell's genetic material. c. protein and not dna is the genetic material. d. neither dna nor protein act as a cell's genetic material