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.
A petechial rash is sometimes referred to as a purpuric rash, petechiae rash, or plural petechiae. The rash is basically a number of small red or purple spots in the skin.here are several causes that can lead to the formation of a petechial skin rash. It may be caused by minor trauma to the skin, leading to some hemorrhaging under the skinâs surface. The hemorrhaging is simply damage to the capillary blood vessels in the skin. This trauma may also be in other forms.