Are all eukaryotes large, multicellular organisms?

Are all eukaryotes large, multicellular organisms? No, protists are eukaryotic and single celled.

Explanation:

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

not sure if this what   you'r looking for would be percent composition