Both plant and animal cells need to produce energy for cellular functions. In both types of cell, this function is carried out by the - O Nucleus O Mitochondria O Chloroplast O Vacuoles

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.

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