<Tr> <Td> 800 Ma </Td> <Td> First multicellular organism may have arisen . </Td> </Tr>
<Tr> <Td> 800 Ma </Td> <Td> First multicellular organism may have arisen . </Td> </Tr>
about how long ago did multicellular life forms appear on earth
about how long ago did multicellular life forms appear on earth
800 Ma
800 Ma