Which type of cell can duplicate indefinitely? stem cell blood cell muscle cell neuron

The correct answer would be stem cells.

Explanation:

Stem cells are the cells that can differentiate into different cell types of the body. They are auto-renewal cells that show the ability to divide to produce the same kind of cells.

These cells show all totipotent, pluripotent, multipotent nature altogether. They function as a repair system for the body. There are 2 main types of stem cells in mammals, embryonic stem cells and adult stem cells.

Thus, the correct answer would be stem cells.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.