Illustration of the ancestral relationship between different organisms/ species

Characteristic shared by two species (or other taxa) that is similar because of common ancestry such as anatomical similarities OR molecular similarities OR developmental similarities

Anatomical structures that perform the same function in different biological species and evolved from the same structure in some ancestor species

Similarities in genes, RNA, or amino acid sequences between different biological species

Similarities in embryo development between different biological species

A structure in an organism that is reduced in size and function and may have been important in the organism’s ancestor

The similarity of structure between two species that are not closely related as a result of convergent evolution; ex: wings of birds and butterflies

The study of the distribution of organisms in geographic areas

The remains, or imprint of organisms related geological data that give us clues about the past and its taxonomic history

Method of determining the age of a fossil by comparing its placement with that of fossils in other layers of rock

Rock that is formed in layers by the depositing and pressing of sediments on top of each other

No living members of that species exists.