Explain the movement of heat that takes place in “The Greenhouse Effect”

What statements describe a host organism?

Can someone i have no idea of how to do this.

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.