Which part of roots is involved in the exchange of respiratory gases

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.

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations

What is it called when lava when it erupts from the surface through volcanoes.