The dirigibility of thought


Two yeasts met in the woods and one of them took the road less traveled by and it made all the difference.
The roads are the divergence point in the phylogenetic tree ca. 200 Mya ago.
(Robert Frost’s original poem is some what different)
But what is beyond ?
Is it possible to have an immortal yeast, just like a HeLA cell ?
What happens to mitochondria in industrial yeast strains ?
If yeasts are perennially fermenting in open industrial vats, is it not expensive for the cells to invest energy in genes that it may never use ?

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