Evidence of Natural Selection

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Across
  1. 4. a record of the history of life on Earth
  2. 5. the best evidence supporting the relationships of organisms on Earth
  3. 6. organs that are “leftover” traces of evolution that serve no purpose
Down
  1. 1. the scientific study of embryo development
  2. 2. body parts that have a similar anatomy but are found in different types of animals because those species shared a common ancestor
  3. 3. intermediate fossils between two living forms