Which of the following statements best describes the geosphere?
a) the sphere that consists of solid rock layers near earths surface
b) the sphere that includes mountains and valleys
c) the sphere that has three main parts: a metal core, a solid middle layer, and a rocky outer layer
d) the sphere that contains beaches

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.