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Analogous structures

Theory

Evolution

Fossils

Extinction

Homologous structures

Embryology

Speciation

Change in populations over time

the remains or impression of a prehistoric organism

Same structures, different functions

A well-substantiated explanation of the natural world, based on facts that have been repeatedly confirmed through observation and experiment.

Same function, different structures

the formation of new and distinct species

the dying out or termination of a species

The study of differences and similarities in embryos. All embryos start off looking similar