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 usually occur on legs which may appear like rash initially but actually they are in clusters. These are small rashes of less than 3 mm diameter. Petechial rash appear when blood vessels (capillaries) bleed and this blood is leaked into the skin.A number of factors like medical conditions, infections, trauma etc. can cause these capillaries to bleed.auses. Petechial rash is usually a result of a trauma or an injury which in turn may be because of conditions like coughing, child birth, weightlifting, crying, vomiting or any activity related to prolonged straining. There are certain medications too that can cause the condition.