chromatin from two tissues, skin and liver, was extracted and analyzed near the gene twist. the liver chromatin was found to be more dnase sensitive than the chromatin from skin cells. what might explain this difference?

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.