Summarize restoration:

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.

frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

yes, because even though a theory has a  lot of evidence to support it, it is not always true