Why do we need joints that permit little to no movement in our skeletons?

Are salt and soap nutrients or toxins for yeast? explain.

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.

Give an example of a trait that is controlled by more than one gene.