Its called cell division or also known as mitosis.
All of the elephants living in a wildlife preserve would be considered a population.
If the cell has a cell wall you know it is a plant cell.
Do you mean when nucleotides get damaged or when they match to each other incoreectly? (which cuases mutants) Specialized Enzymes repair, different one respond to help different types of damage. Detail the question more, maybe then i can help more.
