In Biology, what is meant by unicellular and multicellular organisms? I mean, do they mean that unicellular organisms contain excactly one cell or is it that they consist of many cells of
![Schematic representation of ciliates Paramecium caudatum, microscopic unicellular organism 4748586 Vector Art at Vecteezy Schematic representation of ciliates Paramecium caudatum, microscopic unicellular organism 4748586 Vector Art at Vecteezy](https://static.vecteezy.com/system/resources/previews/004/748/586/non_2x/schematic-representation-of-ciliates-paramecium-caudatum-microscopic-unicellular-organism-vector.jpg)
Schematic representation of ciliates Paramecium caudatum, microscopic unicellular organism 4748586 Vector Art at Vecteezy
![Fungal evolution: diversity, taxonomy and phylogeny of the Fungi - Naranjo‐Ortiz - 2019 - Biological Reviews - Wiley Online Library Fungal evolution: diversity, taxonomy and phylogeny of the Fungi - Naranjo‐Ortiz - 2019 - Biological Reviews - Wiley Online Library](https://onlinelibrary.wiley.com/cms/asset/08a3ca18-52f3-4163-9f51-0934e5b8139f/brv12550-fig-0002-m.jpg)