Give reasons as to why the following processes are different from each other:
$(a)$ Fission in $Amoeba$ and $Plasmodium$.
$(b)$ Binary fission and Fragmentation.

(N/A) In $Amoeba$,binary fission occurs,where the parent cell divides into two daughter cells. In $Plasmodium$,multiple fission occurs,where the parent cell divides into many daughter cells simultaneously.
$(b)$ In binary fission,a single-celled organism divides into two daughter cells. In fragmentation,the body of a multicellular organism breaks into two or more pieces,and each piece develops into a new individual.