Why would it be important to separate witnesses? O To prevent contamination of evidence
O To protect them from the perpetrator
O To avoid collusion
O To prevent fighting among witnesses

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.