<em>these are the <u>sclereids ...</u>also called stone cells which make them gritty ...
it is the type of sclerenchyma cell that may be lignified also:)</em>
Two amino acids can be joined by a protein.
Least dense to most dense: gas, solid, liquid.
These waves are of a higher frequency than surface waves. The first kind of body wave is the P wave or primary wave. This is the fastest kind of seismic wave, and, consequently, the first to 'arrive' at a seismic station. The P wave can move through solid rock and fluids, like water or the liquid layers of the earth.
