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Common Ancestry

Evolution: Evidence of Common Ancestry

TermDefinition
Fossil record remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock
Biogeography location of these fossils or artifacts helps to gather important information about the preexisting life
Homologies similarities in anatomy, molecular components, and development
Anatomical similarities between the structure of two organisms
Homologous structures perform the same function in different biological species and evolved from the same structure in ancestor species; structure based not function based
Analogous structures show similarity of structure between two species that are not closely related; function based not structure based
Development patterns and similarities have been identified throughout embryonic developmental stages of vertebrates and even in some plants
Molecular patterns of similarities found in DNA and amino acid sequences of different specie
Genome all the genetic information an organism has
Gel electrophoresis used to to separate macromolecules such as DNA, RNA, and proteins
Abrupt appearances organisms simply seem to “abruptly” (suddenly or unexpectedly) appear without any evidence of intermediary stages
Stasis relative lack of evolutionary change over a long period during the history of a species
Gradualism the process of slow changes in a species over time
Punctuated equilibrium the occurrence of a sudden change and stasis has become one of the most forefront because there is more fossil evidence to support this mechanism
Created by: NEISDSci
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