Question

If all unicellular organisms were grouped into a single kingdom, what problems would arise?

Answer 1

Grouping all unicellular organisms together would place prokaryotes like bacteria and eukaryotes like Amoeba and Paramecium in the same kingdom despite their fundamental differences in cell structure, nucleus, nutrition and evolutionary history. Such a classification would be artificial, hide important relationships, and make it difficult to study the diversity and evolution of organisms.