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9 Cards in this Set

  • Front
  • Back
gradual change of allele frequencies found in a population
Organic Evolution
continual change that occurs in species over time
Geologic Evolution
continual change that the earth undergoes
Index Fossil
fossils that permit the relative dating of rocks within a narrow time span
Analogous Structures
structures found in different types of organisms that are similar in function or outward appearance but dissimilar in basic structure
Homologous Structures
structures found in different kinds of organisms that have the same basic arrangeent of parts and same patterns of embryological developement
process in whihc geologists determine the relative ages of rock layers and fossils in a local region
the end of a species when the last individual of that species has died
Vestigial Structures
nonfuctional structures in an organism that are remainders of structures that were fuctional in some ancestral form of an organism