Yes it is.
"Yes it is."
Oh, well in that case you convinced me. I should have thought of that. How careless of me. /s
What biological or genetic function fails to work if some forms of life arose independent of some others?
BTW, a good friend of mine is completing his doctorate in molecular biology, and he told me he does not embrace common descent. I think he may understand biology and genetics since a major medical institution is employing him to research cancer.
Go ahead and demonstrate though how it is not possible to understand biology and genetics without embracing common descent.