Scientific investigations are done by following which process? a scientific hypothesis
b scientific method
C scientific law
d scientific theory

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.

answer; /// the shaft of the hair consists of dead cells;