Sorry Penguin, I'm trying to get used to using my new joystick...as mentioned above.
Awaiting response from Gyrene...
There are different species, they all just share the same ancestor.
-Penguin
If you are talking the ancestor being a single cell organism, that is probable if the single cell organism had the ability to change its own genetic structure to evolve into different life forms...but that is where it stops, an invertebrate cannot evolve into a vertbrate of a higher order nor can that ancestor of a higher order change itself to the point of evolving into an even higher life form in a different order...contrary to the popular beliefs by lay evolutionists, otherwise the human genome could be reverse engineered through genetic manipulation and we could all have gills.
Your debate seems to broad to me... Any way your willing to norrow it down a bit?
Organic Evolution -Origin of life.
Macro Evolution- Changing from one kind into another.
Micro Evolution -Variations within kinds.
Of all ideas on evolution the easiest to prove (to a point) is Micro evolution...and to that I offer no argument as I have seen it myself. Organic evolution could be argued as part of the theory of Macro evolution...but I agree with science in that it is separate and though arguable, it is generally agreed that at the lowest common denominator, it is provable to a point. Macro evolution is the theory that seems to be the most popular for those who argue against intelligent design...and has yet to be proven based on the scientific method.
I'll leave it to Penguin to decide which area he wants to try and argue.