Which of the following is not a way carbon dioxide returns to the atmosphere a. decay of organisms b. emissions by factories c. photosynthesis d. respiration

your answer should be c) enjoy!

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.