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record of all the fossils ever discovered on Earth.
fossil record
the science of the development of embryos from fertilization to birth.
embryology
body part that has lost its original function through evolution.
vestigial structure
body parts of organisms that are similar in structure and position but different in function.
homologous structures
body parts of organisms that are similar in structure and position but different in function.
homologous structure
body parts that perform a similar function but differ in structure.
analogous structures
event that occurs when the last individual organism of a species dies.
extinction
a fossil that has characteristics of both ancestral organisms and organisms that evolved later.
transitional fossil
the study of similarities and differences among structures of different species.
comparative anatomy
a chart that divides Earth’s history into different time units based on changes in the rocks and fossils.
geological time scale
a chart that divides Earth’s history into different time units based on changes in the rocks and fossils.
transitional fossil
record of all the fossils ever discovered on Earth.
fossil record
body parts that perform a similar function but differ in structure.
analogous structure
event that occurs when the last individual organism of a species dies.
extinction
the study of similarities and differences among structures of different species.
comparative anatomy