Topic 2.5

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Across
  1. 1. Different cells working together can be compared to an ______
  2. 4. Most unicellular organisms only live in ____ environments
  3. 6. Onion skin cells serve a _______ purpose
  4. 10. Multicellular organisms can live in a _____ of environments
  5. 12. Red blood cells need more surface area to carry ___
  6. 14. Organs work together in ________
  7. 15. Many plants and animals are made of ______ of cells
  8. 16. Cells are said to be ______ for specific tasks
  9. 17. ______ organisms cannot grow very large
Down
  1. 2. The bodies of multicellular organisms are more ______
  2. 3. Groups of specialized cells work in ______ together
  3. 5. carries signals between the brain and other body parts to co-ordinate activities.
  4. 7. Groups of different tissues form _______
  5. 8. Groups of similar cells are called ______
  6. 9. Onion cells are ___ shaped
  7. 11. This type of tissue protects the outside of the body
  8. 13. Red blood cells have a ____ like shape