Europa writes:
I may be wrong but my understanding of evolution does not contradict the statement: "All human beings are descendants of Adam."
On the contrary, it certainly does contradict such a statement.
The Mitochondrial Eve concept refers to the single human woman through which all living humans today descend through their mother. Conversely there is a Y-chromosomal Adam which is tracing all living humans to a single male heir through their father.
The complication is that those two, ME and MA, lived thousands of years apart from each other. In fact MA lived roughly 110,000 years later than ME. What this means is that humans prior to the birth of MA must have been born of a descendant of ME and some other male which may or may not have been an ancestor of the eventual MA. Its guaranteed that "All human beings are descendants of MA," is false.
Now you might be arguing that we should simply define ME's partner as being "Adam", but that leaves the 110,000 year gap with all those human males that are not descended from "Adam" until MA is finally established.
Or you might argue that once MA is established beside a long descendant of ME that couple should be defined as "Adam" and "Eve". But that still doesn't work because for your statement to be true all previous generations leading up to that must be redefined as being something other than human, a distinction serving no purpose other than to validate your statement.
So no, your statement "All human beings are descendants of Adam," is completely contradicted by evolution and our biological knowledge.