The first eukarotes appeared about __________ years ago?

Explanation

The earliest widely accepted eukaryotic fossils are approximately 1.5 billion years old, although estimates vary with the fossil evidence used. Eukaryotic cells appeared after prokaryotes and are distinguished by a membrane-bound nucleus and organelles. Students may choose 2.5 billion years because it is also a commonly quoted approximate date for early complex cellular life, but 1.5 billion years is the intended textbook value.