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Across 3. a group of cells that form parts of living things 4. to make a picure in mind 7. not changing or stopping 9. the process by which something is kept in good condition 11. to require, support 13. to prove or make an example by visual means, syn. show 18. to decompose or divide into parts 19. very small living thing which often causes a disease 20. a living thing, syn. organism 21. basic, fundamental

Down 1. to allow, to continue happening or living 2. a living thing that consumes and breaks apart dead matter 5. joined together 6. over and above 8. a living thing that consumes decaying matter, plural. fungi 10. a substance that contributes to the health of a living organism 12. a course along which some process occurs 14. a living thing 15. a living things 16. a living thing (like a plant that makes its own food and can be used for food) 17. to move or change the positionsning of something in relations to something, syn.shift