Fill in the missing words...

Most mutations are harmful. In developing ___(i)___ they cause ___(ii)___ development and may cause early ___(iii)___. In older tissue, they can cause cells to keep on ___(iv)___ uncontrollably. These cells develop into ___(v)___, spread into other parts of the body and so become ___(vi)___.

(Marks available: 6)

Answer