Which class of biologically important molecules are steroids related to? nucleic acids proteins lipids carbohydrates

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.

the answer would be..

b. sucking

its temperature is increasing. this causes molecular vibrations to increase.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves