Direction Cosines are the Cosines Of the Angles of the angles between and the line and the coordinate Axis. If we have a vector (a,b,c) in space then two a=x2-x1,b=y2-y1 and c =z2-z1 are called the direction...
Stem cells are unspecialized(undifferentiated) cells that have the ability to differentiate into other cells, and self-regenerate. These cells divide to produce one daughter cell that remains a stem cell...