Which of these would improve the water quality in a watershed? a. reduction in pesticide use b. use of more fertilizer c. destruction of wetlands d. erosion of more topsoil

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.