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