Evidence of Evolution (Notes 3)

Scientists can explore whether two different animal species have evolved from a common ancestor, using evidence from all of the sources below except

• Comparing their strands of DNA

• Comparison of the animals' bone structure

• Comparison of the experiences of each organism

• Studying their embryos during development

The field of _________ involves studying fossils and comparing them to living species.

• Embryology

• Paleontology

• Biogeography

• Anatomy

Two body structures, found in species that are related, have similar structures but serve different functions in each species. This describes____________.

• Homologous structures

• Analogous structures

Two body structures, found in unrelated species, have different structures but serve similar functions in each species. This describes___________.

• Homologous structures

• Analogous structures

The appendix has no apparent function in humans today, but scientists think it used to help human ancestors digest certain foods. The appendix could be considered a _____________.

• Homologous structure

• Vestigial structure

• Analogous structure

• Adaptive structure