Why doesnt mutation always affect a whole species?

What does it mean for a cell membrane to be selectively permable

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.

Which entry is in the wrong position in the table?