[Dimensio]

It proposes that animals and plants have their origin in preexisting types and that the distinguishable differences are due to modifications in successive generations.

That's part of it. There's also the environmental selection pressure. That's also extremely important to shaping which organisms end up existing.

That has nothing to do with things appearing out of nothing, though.

What is the origin of those preexisting types?

Since the process that caused imperfect replicators to exist in the first place had to require, in at least one step, a time when no imperfect replicators existed at all, that origin is outside of the explanatory scope of the theory of evolution. That is to say that the mechanism that caused the first life forms to exist has no bearing on the mechanism by which those imperfect replicators branched off into diverse species, or, in clearer terms, evolution doesn't depend on life originating from any specific method.

You have yet to demonstrate that evolution makes any claims regarding "something or everything" appearing out of nothing.

[jw777]

"That is to say that the mechanism that caused the first life forms to exist has no bearing on the mechanism by which those imperfect replicators branched off into diverse species, or, in clearer terms, evolution doesn't depend on life originating from any specific method."

that is all I'm getting at. THat there is a possibility that an Intelligent Designer (not like Ralph Lauren) or God created or initiated the originating replicator.