Why doesn’t evolution have a plan? Discuss in depth actual examples that explain why species do...

Why doesn’t evolution have a plan? Discuss in depth actual examples that explain why species do not evolve because they need to, have to or want to.

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Evolutionary changes in a population can happen when the relative frequency of alleles in the genepool changes. Evolution has no plan; it simply happens. Evolution does not come with any objective that is improvement. The only factor that is constantly improving is the adaptedness of individuals to their given environment. Since the environment changes, this progress always remains relative – progress relative to the adaptedness to an environment.

Evolution can able to change the direction. This process is fully depending on the environmental conditions, and it can be possible that abilities are lost or stunted. As for example, cave fishes live in completely dark caves under the surface; they have eyes that, unlike their ancestors, are permanently degenerated. As the dark environment lacks any selection pressures for sight, mutations that are responsible to harm eyesight (so the energy is saved for other organs) where not to the fishes disadvantage.

gladiator answered 1 year ago

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