But is this natural selection?



Article reads: But it wasn’t just evolutionary luck that allowed the EWs to prevail over the ELs. When the researchers “replayed” evolution by culturing 10 replicate populations for each of the four strains for 883 generations, the EW populations almost always came out on top, acquiring more beneficial mutations that allowed them to overcome their fitness disadvantage to the ELs. The results suggested that the EWs, while initially at a disadvantage, prevailed in the long-term because they were more likely to acquire more beneficial mutations. In other words, the EWs had greater evolvability.

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