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BILD3

Lecture 3

TermDefinition
Extinction the state or process of a species, family, or larger group being or becoming extinct
Extant to refer to taxa, such as species, genera and families, that are still in existence, meaning still alive
Extinct the termination of an organism or of a group of organisms (taxon), usually a species
Succession fossils from one region similar to extant organisms from that same region
Fossil any trace of an organism that lived in the past
Homologous similar in position, structure, and evolutionary origin but not necessarily in function
Transition fossil any fossilized remains of a life form that exhibits traits common to both an ancestral group and its derived descendant group
Vestigial structures function less or rudimentary organ in one species that has an important function in other species
Analogous structures do not share a common ancestor with the same structure
Developmental homology similarities during development, despite differences in adults
Genetic homology the conserved function of homologous genes across species
Molecular homology similarities among organisms at the molecular level
Created by: stacymdez