The process of cellular differentiation is a direct result of a differiental
Zero degrees latitude is the line designating the Equator and divides the Earth into two equal hemispheres (north and south).
This <span>statement should be classified as</span> a theory
Each cell is alive even if it is part of a multi celled body, and all living organisms consist of one or more cells. Also, cells reproduce by dividing so it follows that all existing cells must have arisen by division of other cells. As a cell divides it passes it hereditary material- its DNA- to offspring.
Your outer skin is your epidermis, so just look at your arm
