Which bactria is more advanced in terms of evolution?
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Evolution is a goal-directed process, but not in the way the question suggests. People often get the false impression that evolution is a ladder, each of the rungs representing a higher, more advanced creature, and stopping at our species as either the perfection of evolutionary advancement, or as the most advanced creature achieved so far. This is a notion that demands evolution be constantly striving toward the bigger, better, more "advanced" creature. Regrettably, the misconception that evolution is always going for the height of perfection has distorted the concept in the eye of the public. The real goal that evolution helps to achieve is the optimum adaptation of a population to its environment. A population of some species or another may migrate into a new environment, and their new surroundings may dictate that their best chance for survival in that area depends on turning green, for camoflauge purposes. Sexual and predatory selection may, over a lot of time, ensure that our aforementioned species changes colors to become less visible to its natural enemies. This would, of course, depend heavily on what genes were currently in the pool (if the color "green" is even an option in a series of genes for the coloring of the animal at the outset), mutations (if the color "green" may crop up as a gene or series of genes in the future), perhaps developing a symbiotic relationship with another organism (a fungus or algae that could grow on fur and provide a greenish tinge). One thing is certain when it comes to the evolution of the species: there is no way that it will turn into an already existing species because we consider one of them to be the "higher" order.