Evolution and Natural Selection

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Across
  1. 3. A trait that helps an organism to survive in their environment.
  2. 4. Changes to DNA. Ex: Rock pocket mice changing color
  3. 5. Movement of alleles from one place to another
  4. 7. A giraffe with a long neck will have higher ________ than one with a short neck when eating leaves from tall plants
  5. 9. Pieces of evidence based on past organisms
  6. 11. Transmissions of gene in small populations
  7. 12. Structures similar in shape and size but different uses
  8. 13. _________ isolation is when species are separated by a physical barrier
  9. 14. ____________ isolation: birds sing and dance to impress the females
Down
  1. 1. Favors traits that are on the extreme
  2. 2. Natural selection acts on the __________ of an organism
  3. 3. Structures such as a bird wing and a butterfly wing
  4. 6. Favors one of the extreme traits
  5. 8. Natural ________ the mechanism in which individuals that are better adapted to their environment reproduce and survive more
  6. 10. Favors the average traits