I know that the Protists are in Domain Eukarya, and that some protists are unicellular. Are there any other eukaryotic group of creatures that are not protists that are unicellular?
1 Answer
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Two other kingdoms contain unicellular organisms.
Some fungi, such as yeasts are unicellular.
Many algal (Plantae) species are unicellular, including the spectacular Valonia ventricosa, which is up to 5 cm (2 inches) in diameter. There is also a genus of seaweed Caulerpa, which is unicellular, though multi-nucleate that is thought to be the largest single-celled organism, being up to about 3 m (10 feet) long.