Which era did dinasours and early mammals live?

The main ingredient of magma is a pahoehoe. b silca c dissolved gases d obsidian

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.

Explain in your own words what caused pangea to separate and why we don't worry about earthquakes in florida.