Question

When amoeba or yeast divides, it produces almost two identical copies. So, does aging happen at all?

Answer 1

Even when an organism divides to produce nearly identical copies, aging still happens at the molecular level. Although binary fission in Amoeba or budding in yeast creates new cells, the mother cell accumulates molecular damage, oxidized proteins, and cellular waste over successive divisions, leading to a finite lifespan and cellular aging.