Unit 1-7=Ripsy rios

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Across
  1. 3. cannot make their own food
  2. 8. many cells
  3. 10. the organ that are involved with breathing
  4. 12. physically combined
  5. 13. A single, highly organized and structured piece of DNA
  6. 17. physical substance
  7. 19. a substance that takes part in and undergoes change during a reaction
  8. 20. The basic physical and functional unit of heredity made up of DNA
  9. 21. make up everything
Down
  1. 1. the supercontinent
  2. 2. the process by which plants and some other organisms use sunlight to make foods from carbon dioxide and water
  3. 4. one cell
  4. 5. the organs that take in food and liquids
  5. 6. it is made of one type of atom only
  6. 7. basic unit of life
  7. 9. A branch of biology concerned with the study of genes, genetic variation, and heredity in organisms.
  8. 11. the network of nerve cells and fibers which transmits nerve impulses between parts of the body
  9. 14. person who discover seafloor spreading
  10. 15. piece technology that was used to discover sea floor spreading
  11. 16. a substance that is the result of an action or process.
  12. 18. an organism that makes it's own food