Unicellular organisms have only one cell in which a<span>ll seven life processes take place.</span><span> These unicellular organisms are self-sufficient. They do not need outside help to function. The multi-cellular organism has to rely on other cells to survive. So, the difference between the cells is that the cells from a multi-cellular organism are interconnected to each other and work together.</span>
The insertion of an extra nucleotide into a DNA strand
Explanation:
The phenomenon called as gene mutation. The insertion will cause nonsense mutation which results in producing stop codon that will cause the polypeptide chain become shorter.