______are the earliest life forms identified on Earth and they date back to nearly 3.5 billion years ago.

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The earliest life forms identified on Earth are prokaryotes, which are simple unicellular organisms that lack a nucleus and other membrane-bound organelles. They date back to nearly 3.5 billion years ago and are believed to have been the first organisms to evolve on the planet. Eukaryotes, which have a nucleus and other membrane-bound organelles, did not appear until much later in the fossil record. Brachiopods and echinoderms are both types of multicellular animals that evolved much later than prokaryotes.

______Are the Earliest Life Forms Identified on Earth and They