The Nature and Variety of Living Organisms

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Across
  1. 2. A spherical, pathogenic bacterium that causes pneumonia.
  2. 4. virus An infection virus that causes influenza (the flu).
  3. 6. Microscopic single-celled organisms.
  4. 9. Loops of DNA found in the cytoplasm of prokaryotic cells.
  5. 11. A single-celled fungus.
  6. 12. Mosaic Virus (TMV) A widespread plant pathogen affecting many species of plants which produces a mosaic pattern on the leaves. It infects chloroplasts and limits plant growth.
  7. 13. The basic building block of all living organisms.
  8. 14. An organelle which is the site of photosynthesis.
  9. 16. Immunodeficiency Virus (HIV) An infectious virus that weakens the immune system and can lead to AIDS (acquired immunodeficiency syndrome).
  10. 18. A collection of thread-like hyphae in a fungus.
  11. 19. A multicellular fungus that has a hyphal structure.
  12. 20. Microorganisms that cause infectious disease.
  13. 22. A non-living organism that can only reproduce inside host cells. Viruses have no cells, but possess a protein coat containing nucleic acids (DNA or RNA).
  14. 23. Pathogenic protoctists that cause malaria.
Down
  1. 1. An endothermic reaction in which energy is transferred from the environment to the chloroplasts by light.
  2. 3. membrane A partially permeable barrier that surrounds the cell.
  3. 5. bulgaricus A rod-shaped species of bacterium used to produce yoghurt from milk.
  4. 7. Long filaments of a fungus that contain many nuclei.
  5. 8. A double-stranded polymer wound to form a double helix. It carries the genetic code.
  6. 10. nutrition The mode of extracellular nutrition in which digestive enzymes are secreted onto the food outside the cell and the products of digestion are absorbed.
  7. 13. A protoctist that has features similar to plant cells e.g. chloroplasts.
  8. 15. cell A type of cell found in plants and animals that contains a nucleus.
  9. 17. Protoctists that live in pond water and resemble animal cells.
  10. 20. cell A type of cell found in bacteria that does not contain a nucleus.
  11. 21. wall An outer, structural layer that surrounds some cells. In plant cells, it is made of cellulose. In fungi, it is made of chitin.