Question

multiple - choice question usually, a mutated cell is harmless. is destroyed. changes back to normal.

Explanation:

In the body's normal defense - mechanism, a mutated cell is usually recognized as abnormal and is destroyed by the immune system or undergoes apoptosis (programmed cell - death). Mutated cells are not usually harmless as they can lead to diseases like cancer. Also, it is rare for a mutated cell to change back to normal.

Answer:

is destroyed.