Answer:
the proton is most likely the answer let me know if I'm wrong or right
An acid because if its less than 5 its an acid
Population because you are holding it
Answer:
B)
Explanation:
The adult stem cell can renew itself and can differentiate to yield some or all of the major specialized cell types of the tissue or organ. The primary roles of adult stem cells in a living organism are to maintain and repair the tissue in which they are found.