So, to start off, I am not even sure if life would develop, because I am not clear on how the mass of the planet or gravitational pull affects chemical evolution, but assuming that life did start in the oceans like it did, how would evolution look, and would the current species still exist in some form?
I understand that this is a very broad question, so feel free to go into however much depth you want to
EDIT: So, this seems to be too broad a question, so I'm trying to make this a bit more specific - let's limit evolution to its early days - i.e. from single celled organisms to multi cellular organisms with dedicated organs- how would this be different? So for instance, would certain current adaptations be faster, slower, or not appear at all in early organisms?