Although possible, it is rare to have keratosis pilaris all over the body. The lesions in keratosis pilaris most characteristically involve the back of the upper arms. Other common locations include the back, thighs, buttocks and occasionally the face. It does not affect the eyes, mouth, palms, or soles. Read Doctor's View.
The Principle of Biological Succession was developed by: Charles Darwin James Hutton Charles Lyell William Strata Smith. The principle of biological succession was developed by: Charles Darwin.
Geologists establish the relative ages of rocks mostly through their understanding of stratigraphic succession. The Principle of Original Horizontality states that all rock layers were originally horizontal. The Law of Superposition states that younger strata lie on top of older strata.