Marsupial mammals give birth to young that complete their development in a pouch on the mother’s abdomen. all the native mammals of australia are marsupials, while these types of mammals are absent or uncommon on other continents. this observation is an example of

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

answerclassical conditioning;