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Across
  1. 1. Gradual development of species.
  2. 3. Unprocessed and unrefined foods.
  3. 7. Farming practice.
  4. 8. Natural oily substances in food.
  5. 13. Ancient human diet.
  6. 14. Ability to maintain ecological balance.
  7. 15. Body's process of converting food to energy.
  8. 17. Early human relatives.
  9. 18. Main energy source, found in bread and pasta.
  10. 19. Seeds used for food, like wheat.
  11. 20. Relating to early human history.
Down
  1. 2. Excessive body fat condition.
  2. 4. State of being free from illness.
  3. 5. Food needed for growth and health.
  4. 6. Foods altered from their natural state.
  5. 9. Fat found in blood.
  6. 10. Sweet carbohydrates.
  7. 11. Essential muscle-building nutrient.
  8. 12. Daily food intake.
  9. 16. Study of heredity.