Thus, altruism is costly to self, but is a beneÃt to others. In other words, the cost of altruism is described exclusively. in terms of changes in Ãtness for a focal individual and the. beneÃt of altruism is described exclusively in terms of the. changes in Ãtness of the complement of the focal individual.
Petechiae on the face and conjunctiva (eyes) can be a sign of a death by asphyxiation, particularly when involving reduced venous return from the head (such as in strangulation). Petechiae are thought to result from an increase of pressure in the veins of the head and hypoxic damage to endothelia of blood vessels.
These spots are flat and donât itch or blanch (turn pale) when you press gently on them. A child may have just a few spots or clusters of them, often appearing on the face, chest, stomach or feet. Petechiae are caused when tiny blood vessels burst underneath the skin. Kids can develop them after a bout of coughing or vomiting, usually on the face.