Chicken skin appears as red or white bumps that usually start to appear on the buttock, upper arms, legs or cheeks. These will often be rough and the skin that is covered in the bumps may be itchy. Because it is less humid during this time, the rash will often appear more frequently in the winter.
The principle of faunal succession is based on the four assumptions of (1) the validity of the principle of superposition; (2) the sequence of fossils are the same everywhere (3) rock layers of different ages will contain different types of fossils; and (4) the validity of the principle of original horizontality. î î î.
Primary succession occurs on ground which had no previous  vegetation, including lava flows, bare rock and sand dunes. For  example, newly created volcanic island    â¦ Secondary Succession follows the destruction or modification  of existing vegetation, either naturally or by human activity. Primary Succession occurs on surfaces where no soil exists, And  Secondary Succession follows a disturbance that destroys a  community without destroying the soil.   Primary succession is slow and secondary succession is rapid.