Which of the following represents a dependent variable in this experiment?
the amount of water provided to each plant
the growth of each plant
the amount of sunlight provided to each plant
the amount of soil provided to each plant

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.