9. Scientists hope the Perseverance rover will find evidence to indicate that

a. Mars is moving closer to earth b. There are underwater lakes on Mars c. Life once existed on Mars D. The Martian atmosphere contains enough oxygen to support life

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.