Surface skin cells regenerate from stem cells found in which specific region?

What is the number of phosphates in an atp molecule

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

What substance is the most acidic. lemon juice. tomato juice. sodium hydroxide. water