be hard to separate colonial protists from true multicellular organisms, because the two concepts are not distinct; colonial protists have been dubbed "pluricellular" rather than "multicellular". There are also macroscopic organisms that are multinucleate though technically unicellular, such as the Xenophyophorea that can reach 20 cm.

Evolutionary history

Occurrence

Multicellularity has evolved independently at least 25 times in eukaryotes,

1.Previous
3.Next