Earths first life form may be non photosynthetic bacteria.
Currently it is not known if life ever existed on Mars.
First of all there is no life of any form on the moon, the reason is there is no oxygen there.
on a computer: printer spooling, server access; in real life: any form of waiting in que is first in first out.
Life is defined by the ability to metabolise, grow and most importantly to procreate or multiply. Supposedly, the first life on earth came in the form of coacervates.
Humans never actualy went to the moon, meaning that nobody knows if there is life out there.
A sheep named "Dolly".
Cyanobacteria. was a late arrival.No one know what the first cells were nor do we understand their chemistry,but the most likely candidates were self reproducing proteins (like prions) somehow bound together.
Because it has been shown beyond doubt that the first form of life was ocean-borne.
The first organized form of life is a tiny protozoa.
DNA
Before the first life? The first life was Eukaryote cells but before them the Earth was a hot molten rock with lava on it.