Evidence of evolution

• What are the evidences of evolution?

  1. Fossil records (paleontology)
  2. Biogeography
  3. Comparative anatomy
  4. Embryology
  5. Biochemistry
• How do fossils provide evidence of evolution?

  • Comparing current and ancient species shows a pattern of gradual change
  • Transitional fossils have been found to link extinct species to current species
  • Fossils are found in sedimentary layers, each layer indicates an age.
• How does biogeography provide evidence of evolution?

  Species in different areas evolve unique traits to adapt to their environments.
• How does comparative anatomy provide evidence of evolution?

  Compares structures of current organisms to ancient organisms.
• How does embryology provide evidence of evolution?

  By comparing the anatomy of embryos(early stage of an organism)
• How does biochemistry provide evidence of evolution?

  -By comparing the DNA and RNA and proteins of organisms to look for similarities.

  -Studies genes and proteins to provide support for biological evolution.
• What is gel electrophoresis?

  A laboratory technique for separating biomolecules
• What types of biomacromolecules can gel electrophoresis separate?

  DNA, RNA, and proteins
• On what basis does gel electrophoresis separate biomolecules?

  Based on size and charge
• How does the similarity of two organisms relate to their DNA on a gel electrophoresis?

  The closer their DNA, the more similar the organisms