What is the difference between
autotrophs and heterotrophs​

autotrophs (producers) are able to make their own food from raw materials whereas heterotrophs (consumers) consume other producers or other consumers

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.