As an analogy to the natural evolution strains of bacteria (e. g. E. coli) are used here. They have genes, on wich basis genetic evolution occurs in them.
In these bacterial strains (e. g. E. coli) gene transfer is possible, whereby some of the genetic information (genetic material or its copies) of one bacterium is transfered to another. There are also mutation processes.
A Fib object can be seen as information, which encodes a multimedia object, as bacterial genes encoding a bacterium (structure and behavior).
In this the single Fib elements shouldn't be seen as the bases of the genes, but as the functionality of genes or set of genes. As with bacteria only with the combination of genes or of the things that they encode (e. g. enzymes) more complex functions are being put into effect (e. g. conversion of sugar into kinetic energy), in Fib objects only by combining of the elements (partial) multimedia objects (e. g. [partial] images) are created.
Fib part objects can also be transmitted, as in gene transfer among bacteria, into other Fib objects and are subject to mutation, wher it is even with the bacteria difficult to say, whether the mutation of genes is really completely random or whether, in the course of millions of years, no mechanisms have emerged, leading to a more "intelligent" mutation, and wherein the random element consists. Individual Fib objects may be viewed not only as individual bacteria, but also as all bacteria with identical genetic information.
The original multimedia object represents the niche, to which the Fib objects (bacteria) should adapt to. They can do this in many different ways, and the adjustment need not be perfect.
However, in the genetic algorithm for Fib objects, operators are sought, which will make directed improvements. Such a mechanism is explicitly directed, which is not to be expected of bacteria evolution.
A good book on evolution in general is "The Plausibility of Life: Resolving Darwin's Dilemma" ("Die Lösung von Darwins Dilemma" [12]).