HELP IM ON A TIMMRRR

How does the carbon cycle involve an exchange of carbon

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.

On his trip to the galapagos islands, darwin determined that animals on the islands