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They say you want an evolution… Ch…ch…ch…changes There are four main categories of evidence showing that evolution happens Fossil Evidence Embryological Evidence Molecular (DNA) Evidence Anatomical Evidence Homologous structures Vestigial organs Fossil Evidence Fossils show how things have changed over time, both on the earth and within living things. Archeaopteryx had the wings, and opposable big toe of a bird but the tail, teeth and claws of a dinosaur. Fossil evolution in whales—Part 1 Fossil evolution in whales—Part 2 Current whale skull Embryological evidence Embryological evidence is seen by looking at the early development of different organisms Embryological development of various animals Molecular evidence By looking at similarities and differences in DNA, we can see how closely related different organisms are. Molecular evidence of evolution—Differences in amino acids in human hemoglobin DNA vs. various animals. Anatomical evidenceHomologous structures Homologous structures are made of the same bones but perform different functions. These limbs are homologousmade of the same bones Humerus- purple Ulna- blue Radius- blue Carpals- red & green Who is the owner of each limb? Anatomical evidence— Vestigial organs Vestigial organs are left over body parts that no longer perform a function. A whale’s leg Wings on flightless birds Human tailbone--there have been many well documented medical cases where the tailbone has been surgically removed with little or no adverse effects. There have been documented cases of infants born with tails, an extended version of the tailbone that is composed of extra vertebrae. In plant-eating vertebrates, the appendix is much larger and its main function is to help digest a largely herbivorous diet. The human appendix is a small pouch attached to the large intestine where it joins the small intestine and does not directly assist digestion. The biggest evidence!!! Evolution is happening as we speak. Flu and other viruses like HIV change as we try to kill them off. Cockroaches and other insects change and develop immunities to different poisons We are changing…getting taller…getting smaller jawbones…