Clade (John Wilkins, Evolving Thoughts)

i-c6e56d029740e2c7a081849956d17389-bcclade.jpg"A clade is, simply expressed, any branch (Greek: klados) of the evolutionary tree which is separated from the rest of the tree by a single cut. Any branch, however large or small, that is cut off this way is monophyletic, or of a single origin. Monophyly is, under cladistic terminology, the property of a single species and all of its descendant species."

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