Which of the following is not part of the cell theory? Cells must contain DNA

Cells can only come from exsiting cells

all living things are made from cells

cells are the basic unit of life

I think it's number 2 (viewpoint)

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.

i believe the answer would be b. hope it : )