Population Dynamics

Just some thoughts and questions maybe someone could answer. Not sure if these have been covered yet.When life sprang up, how did it remain in a constant state of balance between herbivores/carnivores/omnivores?Survival of the fittestCarnivores eat herbivores, given lack of foliage for herbivore survival, both run out of food, herbivors die off, carnivor eats itself out-self distruct?Herbivores would have needed appropriate digestive abilities to digest any available foliage currently available. Same beginning cells would have had to split at sometime to grow into plants as well as animals. both different cell make-up.
If only herbivores existed in the beginning, what would be the benefit or possiblity of becoming carnivorous given plenty of foliage?If only carnivorous, would quickly eat itself out.Had each group had to evolve in order to obtain their respective characteristics to ensure survival, how did they survive to begin with?Edited by godservant, : No reason given.Edited by AdminNosy, : No reason given.

I'm just saying that they had to have started out feeding on something. If there was no foliage, then they would have had to eat eachother, if there was foliage and they ate that, what would be the purpose of eating eachother unless they ate all the foliage up??Or did they just drink the cosmic soup they were created in? Kinda like a fetus drinking amniotic fluid??

ok, so how many cell life forms happened to pop up when lightening hit that cosmic pool? Did they appear all in the same place? Was it just one in the beginning or many? The same or different? Isolated or in varied places? What are the chances the same cosmic soup was available all over the world for them all to appear when the lightening struck? (I'm being sarcastic about the lightening by the way)