Do we know what type of organism first started life on Earth?

nukeman

I am not sure on this, so hope someone can shed some light on this.

What type of organism was thought to be among the first on earth? I am not sure if this is the right way to ask this :)

Lets say if I wanted to see, or do tests on an organism, and my tests were related to doing tests on the first organism on earth, or the first life on earth, what would it be?

For some reason I thought algee was among the first on earth after the heavy volcanic period, and when it started to first rain.

Thanks guys!

granpa

look up:
PAH world
RNA world
archaea