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This replicative cascade—viruses both within an individual and then from one person to the next—is the basic principle of exponential growth: the rate of increase in virus number is proportional to the viral number—more makes more—a recipe for a mind-boggling acceleration into an increasingly “different” world.

While Boatsetter and GetMyBoat may advertise themselves as “Airbnb for boats,” the two business models may not be replicative, says Apurva Jain, associate professor of operations management at the University of Washington.

In addition to evading elimination, paternal mtDNA molecules would need to have a considerable replicative advantage over maternal ones to reach meaningful proportions.

Every meme is similarly mindlessly replicative.

Saunders, D. & Powers, A. C. Replicative capacity of β-cells and type 1 diabetes.