Lessons Divided by Standard EOC D.1.K Explain how natural selection and its evolutionary consequences provide a scientific explanation for the fossil record of ancient life-forms and the striking molecular similarities observed among the diverse species of living organisms

Fossils Similar fossils were found in some layers and not others. Older fossils in lower layers. This showed that organisms changed with the environment.

Evidence for Evolution In Fossils The Fossil Record-Layer show change Geographic Distribution of Living Things Homologous Body Structures How organisms adapted to different environments as the Earth changed.

Fossils A fossil is the preserved remains or imprints of ancient organisms. Someone who studies fossils is called a paleontologist. Fossils are found in sedimentary rock formed when sand and silt settle to the bottom of water. Not all animals turn are fossilized, why? Do you think we have a complete fossil record?

Determining ages of Fossils Relative dating- Looks at the layer of the earth they are found. The oldest fossils will be deeper. Radioactive dating Determined by remaining radioactive isotopes the fossil contains.

Evidence of Evolution DNA All living things have DNA Genome Sequencing Human DNA 98% similar to the ape.

Genome Sequence