Which Weeds Are Getting Whacked?

My wife took a look at out neighbor's freshly mowed lawn and asked an excellent question: Are dandelions being selected for-- are they surviving-- because of their ability to withstand lawn-mowing? and judging by the number that survived the mower, they are . . . perhaps the dandelions with the stronger, more flexible and whippier stems are surviving and these traits are becoming more pronounced in suburban dandelions . . . and I'm not sure how you could measure this-- you either need pre-lawnmower dandelion DNA or access to some wild strain of dandelion and then you could do some measurements on the tensile strength of the stems . . . or run an experiment with the wild strain and see if over generations the stems change . . . but maybe there is a more elegant solution: so I will ask Quora and see.