How is carbon mainly used in all organisms? Carbon is needed for transpiration.
Carbon is needed for chemical reactions in ammonification.
Carbon is used in storage compounds and cell formation.
Carbon is used in building genetic material.

Explanation:

weathering is the answer.

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.