Well I don't know much but I do know that they are different because unicellular can self produce which means they can reproduce without someone else but multicelluar needs someone else to reproduce
That one of then is not organic and the other is organic and remember -in stands for not
I think it my be a structure to life
1.Biological species concept
2.Cladistic species concept
3.Cohesion species concept
4.Competition species concept
5.Ecological species concept
6.Evolutionary species concept
7.Isolation species concept
8.Phenetic species concept
9.Phylogenetic species concept
10.Recognition species concept
11.Typological species concept
For descriptions just look them up :)
