Unicellular Organisms

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Across
  1. 3. Organism that provides food and shelter for a parasite.
  2. 4. Organism or virus that lives on or in a living host organism and takes food from it, causing harm to the host.
  3. 6. A member of the animal kingdom. Animals are multicellular and have cells without cell walls.
  4. 8. A non-living particle that can change how a living cell functions when it enters a cell. Inside a cell, a virus often causes the cell to make copies of the virus.
  5. 9. A member of the plant kingdom. Plants have chloroplasts and so can photosynthesise.
  6. 10. A substance that can speed up some processes in living things (e.g. by breaking down food molecules).
  7. 12. When a virus (or DNA) makes copies of itself.
  8. 15. An organism made of many cells.
  9. 17. A long molecule that contains instructions for organisms and their cells.
  10. 18. When particles spread and mix with each other without anything moving them.
  11. 21. Length of DNA that contains the instructions for making a protein, and helps to produce an inherited characteristic of an organism.
Down
  1. 1. A member of the protoctist kingdom. Many protoctists are unicellular.
  2. 2. Organism too small to be seen with the naked eye.
  3. 5. Type of prokaryote organism. Plural is bacteria.
  4. 7. fission, When a cell splits in two.
  5. 11. There are five kingdoms into which organisms are divided: plants, animals, fungi, protoctists and prokaryotes.
  6. 13. A member of the prokaryote kingdom. Prokaryotes are all unicellular and have cells that lack nuclei.
  7. 14. A member of the fungi kingdom. A fungus can be multicellular or unicellular but does not make its own food. Plural is fungi.
  8. 16. Basic unit of all life. All organisms are made of cells.
  9. 19. A tail-like structure that rotates, allowing a unicellular organism to move. Plural is flagella.
  10. 20. An organism made of one cell.