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each egg were to hatch, and the fish survive, the sea would shortly become a solid mass of codfish. The house fly is said to have 20,000,000 descendants in a season, counting several generations of progeny, from its several broods. And some scientist has computed that the aphis, or plant-louse, breeds so rapidly, and in such enormous quantity, that the tenth generation of one set of parents would be so large that it would contain more ponderable animal matter than would the population of China, which is estimated at 500,000,000! And this without counting the progeny preceding the tenth generation!
The result of the above conditions is very plain. There must ensue a Struggle for Existence, which necessitates the Survival of the Fittest. The weak are crushed out by the strong; the swift out-distance the slow. The individual forms or species best adapted to their environment and best equipped for the struggle, be the equipment physical or mental, survive those less well equipped or less well adapted to environment. Animals evolving variations in structure that give them even a slight advantage over others not so favored, naturally have a better chance to survive. And this, briefly, is what Evolutionists call "The Survival of the Fittest."
As appertaining to the Struggle for Existence, color and mimicry are important factors. Grant Allen, in his work on Darwin, says concerning this, and also as illustrating "Natural Selection": "In the desert with its monotonous sandy coloring, a black insect or
