Which of the following biogeochemical cycles is used in cell formation and storage compounds in all organisms? A. Nitrogen Cycle B. Carbon Cycle C. Hydrologic Cycle D. Phosphorus Cycle

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.