Examlex
The most accurate interpretation of a yawn is boredom.
Left Africa
Refers to the migration of Homo sapiens out of Africa approximately 60,000 to 80,000 years ago, leading to the eventual global distribution of humans.
Monophyletic
Describes a group of organisms that are classified in the same taxon and share a common ancestor.
Polyphyletic
Describes a taxonomic group that does not share an immediate common ancestor and therefore does not form a clade.
Clade
A single “branch” in the tree of life; each clade represents an organism and all of its descendants.
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