Examlex
The vertebrate lung first appeared in ____.
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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