Answer:
Evolutionary change does not always lead to greater complexity.
When an environment changes, certain organisms are going to be able to survive better due to their heritable traits. The organisms that survive better are able to reproduce and pass their genes onto their offspring. But the organisms that survive are not always the ones who have the most complex traits.
For instance, if there are some organisms in a species that have super complex mating rituals, they may actually have a lower fitness because they are much pickier at choosing who they reproduce with and therefore have fewer offspring. The ones who have a very simple mating ritual could possibly reproduce more often and will therefore have a greater fitness as a result.
Evolutionary change does not always lead to greater complex because some changes are not more complex.
Biological evolution is a term to refer to the set of phenotypic and genetic changes of biological populations through generations to improve the species.
Evolution is a characteristic process of all living organisms on Earth. In addition, several studies on evolution affirm that all organisms have a single ancestor and evolution has been the phenomenon that allowed the emergence of several increasingly complex species.
However, evolutionary changes do not generate more complex organisms, but simpler ones. An example of this is the loss of wisdom teeth in humans.
According to the above, evolutionary change does not always lead to greater complexity because evolutionary changes respond to climatic variations and specific conditions and do not always require more complexity.
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