8302-05-05-EvidenceEvolution-GN-TE.pdf

Warm-Up ? Evidence for Evolution Lesson Question How do similarities between different species support the theory of evolution? Lesson Goals Explore how similarities between different species support the theory of evolution. Determine how comparative anatomy Compare supports the of embryological dev...

Warm-Up ? Evidence for Evolution Lesson Question How do similarities between different species support the theory of evolution? Lesson Goals Explore how similarities between different species support the theory of evolution. Determine how comparative anatomy Compare supports the of embryological development in different organisms. theory of evolution. W 2K patterns Words to Know Fill in this table as you work through the lesson. You may also use the glossary to help you. embryo homologous structure comparative anatomy vestigial structure analogous structure embryology © Edgenuity, Inc. a fertilized egg that is attached to the uterine wall a similar body part found in two different species that provides evidence of a common ancestor the branch of science that looks at and compares the structures of different organisms a structure that has evolved to no longer be used by an organism a structure found in two different species that has the same function but evolved differently the study of the development of an embryo 1 Warm-Up Evidence for Evolution Fossils and Evolution The fossil record provides information on the history of life on Earth. By knowing the age and location of a fossil, scientists can show: how organisms have changed. which organisms lived during the same time period. which organisms have a common © Edgenuity, Inc. 2 ancestor. Instruction Evidence for Evolution Slide 2 Comparative Anatomy science Comparative anatomy is the branch of that looks at the structures of different organisms and compares them. Organisms that are closely related to each other have many in common. Homologous Structures A homologous structure is a similar body part found in two different species ancestor evidence of a common that provides Homologous structures may have a different function. 4 Analogous Structures An analogous structure is a structure found in two different species that has the same function but differently. evolved Analogous structures show how organisms adapted to similar environments. © Edgenuity, Inc.. 3 structures Instruction Evidence for Evolution Slide 4 Vestigial Structure A vestigial structure is a structure that has evolved to no longer be used by an organism. Vestigial structures The appendix were once fully functional in an ancestor. is thought to have once been used to aid in digestion of plant material or other 7 food. Embryology development Embryology is the study of the Embryos of different organisms look very organisms share a common ancestor. © Edgenuity, Inc. 4 similar of an embryo. , which shows that the Instruction Evidence for Evolution Slide 7 Embryology Certain traits appear in early embryos, but may organism is fully developed. Gill slits Tail Circle the gill slits in the fish and human embryos. © Edgenuity, Inc. 5 disappear before the Summary ? Lesson Question Evidence for Evolution How do similarities between different species support the theory of evolution? Answer (Sample answer) Similarities between different species support the theory of evolution by showing how organisms share a common ancestor by using embryology, which is the study of the development of an embryo. Slide 2 Review: Key Concepts Comparative anatomy looks at homologous structures, analogous structures, and vestigial structures. Homologous Analogous structures provide evidence of a common ancestor. structures show how organisms evolved similar structures as they adapted to similar environments. Vestigial structures were once fully functional in an ancestor, but have evolved to no longer be used by the organism. © Edgenuity, Inc. 6 Summary Evidence for Evolution Slide 2 Review: Key Concepts Embryology Embryos helps scientists determine which organisms are related. of different organisms look very similar, which shows that the organisms share a common ancestor. Use this space to write any questions or thoughts about this lesson. © Edgenuity, Inc. 7