The Myth: Evolution causes something to go from “lower” to “higher”

Top 10 Ridiculously Common Science Myths

The Myth: Evolution causes something to go from “lower” to “higher”

While it is a fact that natural selection weeds out unhealthy genes from the gene pool, there are many cases where an imperfect organism has survived. Some examples of this are fungi, sharks, crayfish, and mosses – these have all remained essentially the same over a great period of time. These organisms are all sufficiently adapted to their environment to survive without improvement.

Other taxa have changed a lot, but not necessarily for the better. Some creatures have had their environments changed and their adaptations may not be as well suited to their new situation. Fitness is linked to their environment, not to progress. [Source] 

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http://listverse.com/2009/04/08/top-10-ridiculously-common-science-myths/