Διαφορά μεταξύ των αναθεωρήσεων του «Κλάδος»

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==Definitions==
{{main|Phylogenetic nomenclature#Phylogenetic definitions|l1=Phylogenetic definitions}}
[[File:Cladogram Crocodilia NL.PNG|thumb|right|200 px|A [[cladogram]] of crocodiles, a visual representation of thentheir relationship]]
===Clade and ancestor===
A clade is termed [[monophyletic]], meaning it contains one ancestor which can be an organism, [[population]], or [[species]] and all its descendants.<ref group=note>
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