Is a way to trace evolutionary history. this history is traced by following the presence of derived characters
A derived character is a trait that arose in the lineage's most recent common ancestor and was passed down to its descendants. The level at which organisms are grouped determines whether or not a character is derived. Four limbs, for example, are a derived feature of the tetrapoda clade.
Evolution in biology refers to any change in the heritable characteristics of biological populations that occurs over successive generations. Evolutionary processes produce diversity at all levels of biological organization, from kingdoms to species, as well as individual organisms and molecules like DNA and proteins.
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