Natural selection has widely been accepted to explain how human evolved what we are now. But as to some complex organs such as eyes, it is hard to explain. Biologists have proposed various ways that these biological structures could develop over time bit by bit to be more intricate. However, a new study comes up with an alternative path backed up by computer models.
Researchers open the study published this week in the journal Evolutionary Biology. According to the study, some structures could have evolved from complex beginnings that gradually grew simple, instead of starting from simpler precursors and becoming more intricate.
Some biological structures are dizzyingly complex and it becomes impossible to have evolved incrementally over time from simple to complexity.Taking the human eye for example, it need all their parts in order to function. If taking away any one piece, and the whole system stops working. Consider three eyes in the head.
A computer model used by co-author Wim Hordijk supports the idea. In the model, complex structures are represented by an array of cells, some white and some black, like the squares of a checkerboard. In this class of models known as cellular automata, the cells can change between black and white according to a set of rules.
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