It doesn't. The article makes a point of showing that the second law applies throughout the life of the organism.
But the life of single celled organisms doesn't end as a result of degeneration. Single celled organisms have never experienced death.
I think this is from the section in your article:
And yet we know that every cell is subject to the second law — simply by needing to fuel itself, it subjects itself to the effects of entropy, otherwise known as heat death. And although it can and does stave off such effects for a while, doing so requires the cell or species constantly to deal with maintaining distance from entropy in all its living functional components, organized globally. Entropy plays a big part in all life — from cells to completed species.
How does a living thing stave off the effects of entropy? What does it do?