Carbohydrates, lipids, proteins (levels of organization), and nucleic acids. what basic role(s) does each type of molecule play in a cell or a living organism?

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explanation:

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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.