Have you counted the number of chemical, biological (even electrical) changes that must occur before an observable change occurs in an organ, tissue, or cell?
1
It has to be a series of profound events a mile long even for the smallest change to happen.
No, it does not.
In any case... the human and chimp genome are seperated by some 40-million-ish genetic differences.
The number that it took to get from the common ancestor to both us and respectively chimps, is probably less, as today's difference is the result of 2 independent evolutionary lines.
To illustrate... take a string, for example "abcdef" and reproduce it in 2 strings.
In both strings, introduce 1 change. For example:
- "
bbcdef"
and
-"abc
ddf"
=> both are now seperated by 2 differences
So what you said about the "trillions" of required changes, is as false as it gets.
That there isn't enough time, is false as well.
There's a timespan of millions of years (good for hundreds of thousands of generations) and furthermore, changes occur in individuals and population sizes typically number in the hundreds of thousands or even millions as well, per generation.
Given an average mutation rate of some 40-ish per newborn (a conservative average estimate), that results in millions of mutations in individuals
per generation. These millions of mutated genes serve as the set on which natural selection then acts. Some of them will be beneficial (higher chance of survival), some will be harmfull (these die), most will be neutral (they'll just tag along with whatever happens).
Those that reproduce, then carry on their mutated genes to the next generation, where they then
accumulate with the new changes of that generation, etc.
It's not rocket science.