Natural Selection Vocabulary

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Across
  1. 2. structures that are similar in different species.
  2. 6. The process by which two species evolve in response to changes in each other over time.
  3. 7. The preserved remains or traces of an organism that lived in the past.
  4. 10. A group of similar organisms that can mate and reproduce.
  5. 12. An inherited behavior or physical trait that helps an organism survive.
  6. 14. The process by which organisms that are best adapted to their environment are most likely to survive.
  7. 15. All the fossils that have been discovered and what scientists have learned from them.
Down
  1. 1. The natural process by which something takes place.
  2. 3. How well an organism can survive and reproduce in its environment.
  3. 4. The struggle between organisms to survive as they attempt to use the same resources.
  4. 5. Change over time
  5. 8. a well-tested explanation for a wide range of observations.
  6. 9. A type of natural selection that acts on an organism's ability to get the best possible mate.
  7. 11. The young organism that develops from a zygote.
  8. 13. A group of organisms that have died out.