Evolutionary research? Inquiring minds want to know

Seeing that evolutionitwits would rather tell me what I mean as opposed to what I say, let's see how they deal with this:

Can you present any research, past or present, that supports the the notion of universal common descent via an accumulation of genetic mistakes?

Can you present any research, past or present, that demonstrates that mutations can accumulate in such a way as to give rise not only to new protein machinery but also to new body plans?

Or are evolutionists still conducting "science" via promissory notes and majority rule? (meaning my questions may be answered some time in the future and that many scientists accept it is good enough to validate the theory now)