evidence of evolution



the study of the similarities and differences in the embryos of different species

similarities in embryos are evidence of common ancestry

Fossil Layers

Fossil are a window into the past,through time the climate became drier, and grasslands slowly replaced the marshesThe oldest fossils show what the earliest horses were like. They evolved a single large toe that eventually became a hoof. This would help them run swiftly and escape predators. Their molars changed over time.

Homologous, Analogous, and Vestigial Structures

Homologous - structures that are related organisms because they were inherited from a common ancestor

Analogous - are structures that are similar in unrelated organisms

Vestigial Structures - evolution has reduced their size because the structures are no longer used


today scientist compare DNA. similar DNA sequences are the strongest evidence for evolution from a common ancestor