Classification Crossword

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Across
  1. 4. the building block of all living things
  2. 5. a plant growing where it is not wanted
  3. 6. the first level of classification
  4. 7. able to be seen with the naked eye
  5. 9. made of many cells
  6. 15. an organism that live on or in another organism called a host
  7. 16. a skeleton inside the body
  8. 17. made of only one cell
  9. 19. the 6th division of the classification of living things
  10. 20. single cells that grow into a new moss plant, fern or fungus
Down
  1. 1. can only be seen with the help of a microscopic
  2. 2. key a key with two choices at each stage
  3. 3. The last level of classification of living things
  4. 8. the process of putting things in to group
  5. 10. a skeleton inside the body
  6. 11. animals with scales covering their body
  7. 12. a scientist who specialises in grouping and naming things
  8. 13. animals with radial symmetry, one body opening and stinging cells
  9. 14. animals with back bones
  10. 18. the 3rd division of the classification of living things