What mineral is heavily mined in the western united states?

Me with biology endocrine system crossword also image left i need with hw

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.

Some substances but not other can cross the (blank) membrane of a cell