Evolution

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Across
  1. 2. A vertebrate in the earliest stage of development
  2. 6. A species from which later species evolved from
  3. 11. Structures in different species that are similar in anatomy because of common ancestry but have different function
  4. 12. upper arm bone
  5. 13. A group of individuals that belong to the same species and live in the same area
  6. 14. Change over time
  7. 15. Ability of an organism to survive and reproduce in its environment
Down
  1. 1. A technique used to determine which of two fossils is older
  2. 3. A trait that helps an organism survive and reproduce
  3. 4. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
  4. 5. what something does
  5. 7. Trait that was useful in ancestors that are inherited today, but that have lost their original use, such as wisdom teeth
  6. 8. An animal with a backbone
  7. 9. A group of similar organisms that can breed and produce fertile offspring.
  8. 10. A trace of an ancient organism that has been preserved in rock.