As a child observes, liquid is transferred from a tall, thin tube into a short, wide jar. the child is asked if there is now less liquid in order to determine if she has mastered:

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.