Identify the topic statement.

roses are a wonderful flower.
roses often symbolize an emotion.
roses are often given with a symbolic meaning.
roses have long been symbolic for both its thorns and its beauty.

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