Which of the following statements about olfactory receptors is false? they are bulb-like structures at the tip of the frontal lobe where the olfactory nerves begin. they are cells. they are located in a mucous membrane at the top of the nose. \ they have small, hair-like extensions.

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.