Which of the following is not a potential sign of skin cancer? a.)a sudden change in a mole's appearance b.)a pimple that lasts more than 2 days c.)a sore that does not heal d.)a mole with an irregular border the answer is b. a pimple that lasts more than 2 days sorry figured it out

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.

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high