For SCIENCE (quite literally too)

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Across
  1. 4. Flowering plants.
  2. 5. When genetic traits change in a
  3. 6. Powerhouse of the cell.
  4. 7. Father of genetics.
  5. 9. Effect of random errors in DNA replication.
  6. 11. A special trait that helps an organism survive.
  7. 12. An organism that makes it's own food.
  8. 15. old remains of an organism.
Down
  1. 1. Ms Buterbaugh's twin.
  2. 2. You received half of these from each parent.
  3. 3. Hydrogen and oxygen together.
  4. 8. Completely killed off.
  5. 10. The one thing you change in an experiment.
  6. 13. Food made by plants.
  7. 14. Cold blooded.Most lay eggs.