18) If a human disorder is sex-linked that means it is

Could someone me with number one you

The influenza virus cause the flu, but not other diseases. why?

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.