Those can be proven and replicated in a lab. Man evolving from a single cell organism however is speculation and could never be replicated nor proven.
Really? How do you replicate gravity in a lab? How do you "prove" electricity? Have you ever studied physics? (Or any science, for that matter?) No one really understands gravity or electricity.
Apparently, you think that the word "theory" is a synonym of "supposition." It is not. In science, a theory is the unifying explanation for all of the known facts, and it can be used to predict other facts which are testable. You cannot do better than a theory in science.
All I can say is, I'm sorry you feel your faith is not strong enough to stand in the light of what we know about the world. God didn't disappear just because we discovered evolution.
Please state the theory of gravity and how it can be "proven" in the lab. HINT: you can't prove any theory in the lab. All you can do is subject a theory to further tests and gather more evidence in its favor.