The oldest eukaryote yet found in the fossil record is Grypania spiralis, a coiled fossil two millimeters wide and more than 10 centimeters long that dates from 1.8 billion years ago. The cell walls of single-celled eukaryotes are also preserved in rocks of this age.

Question

The oldest eukaryote yet found in the fossil record is Grypania spiralis, a coiled fossil two millimeters wide and more than 10 centimeters long that dates from 1.8 billion years ago. The cell walls of single-celled eukaryotes are also preserved in rocks of this age.
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GPT 3.5 · Answer

Grypania spiralis is the oldest known eukaryote found in fossils, dating back 1.8 billion years. Its spiral shape and preserved cell walls provide evidence of early eukaryotic life on Earth.