The sum of the protons and neutrons in an atom equals the?

Iwill give extra points to who gets this right

Mitosis is a type of cell division that produces cells that are identical to the parent cell. meiosis is a different type of cell division that produces cells that carry have a genetic material of the parent cell. based on the information provided how do the purpose of mitosis and meiosis differ

The chemical bond connecting one nucleotide with the next one along the nucleic acid chain is called a