Here's a breakdown of the traditional five kingdoms and their cellularity:
* Monera: This kingdom (now often split into Bacteria and Archaea) consists entirely of unicellular prokaryotes.
* Protista: This kingdom is a mixed bag, containing both unicellular and multicellular organisms.
* Fungi: The vast majority of fungi are multicellular, though some yeasts are unicellular.
* Plantae: This kingdom primarily consists of multicellular organisms, although there are some unicellular algae.
* Animalia: All animals are multicellular.
Therefore, while some kingdoms have unicellular representatives, others, like Animalia, are entirely multicellular.
It's important to note that the five-kingdom system is outdated. Modern classifications are based on phylogenetic relationships and often recognize a higher number of kingdoms, including the domains Bacteria, Archaea, and Eukarya.
