Which is an example of an organism? a. a snake's heart b. the stripes on a tiger c. a hickory tree d. a beehive

the answer is "a.) well–developed vascular system."

explanation:

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.