Medical Definition of monophyletic theory
: a theory in physiology: all the cellular elements of the blood derive from a common stem cell — compare polyphyletic theory
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“Monophyletic theory.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/monophyletic%20theory. Accessed 22 May. 2022.
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