Evolution/Natural Selection Study Guide

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Across
  1. 4. With oxygen
  2. 6. Struggle for survival
  3. 10. _________ evolve, not individuals
  4. 12. Group of organisms, of the same species
  5. 13. Change over time
  6. 16. Exact age of fossils
  7. 18. Where photosynthesis takes place
  8. 19. Genetic makeup
  9. 20. Variety of living things
Down
  1. 1. Maximum number of organisms that can live in an area
  2. 2. Characteristics of organisms that increase survival and reproduction rates
  3. 3. Where cellular respiration takes place
  4. 5. Age of fossils that is based on where they were found
  5. 7. Theory that eukaryotes evolved from prokaryotes
  6. 8. The comparison of different organism's structure
  7. 9. Idea that all organisms are related to each other
  8. 11. Without oxygen
  9. 14. Physical appearance
  10. 15. A record of all the fossils ever recorded.
  11. 17. People who have or are carriers of Sickle Cell have immunity against _____