Choose the term that best completes the sentence: absolute dating allows a scientist to determine the.. a: exact age of a sample b: the age range of a rock and fossil samples c: the age of a sample in relation yo othet samples in the area d: the age range of only rock samples

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.