1 The Nature and Variety of Living Organisms (Single Award)

1234567891011121314151617181920212223
Across
  1. 2. The basic building block of all living organisms.
  2. 5. A double-stranded polymer wound to form a double helix. It carries the genetic code.
  3. 9. A spherical, pathogenic bacterium that causes pneumonia.
  4. 12. A partially permeable barrier that surrounds the cell.
  5. 15. The mode of extracellular nutrition in which digestive enzymes are secreted onto the food outside the cell and the products of digestion are absorbed.
  6. 16. Pathogenic protoctists that cause malaria.
  7. 18. Loops of DNA found in the cytoplasm of prokaryotic cells.
  8. 19. Microorganisms that cause infectious disease.
  9. 21. An infection virus that causes influenza (the flu).
  10. 22. An endothermic reaction in which energy is transferred from the environment to the chloroplasts by light.
Down
  1. 1. A rod-shaped species of bacterium used to produce yoghurt from milk.
  2. 2. An outer, structural layer that surrounds some cells. In plant cells, it is made of cellulose. In fungi, it is made of chitin.
  3. 3. Microscopic single-celled organisms.
  4. 4. 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).
  5. 6. Protoctists that live in pond water and resemble animal cells.
  6. 7. A type of cell found in plants and animals that contains a nucleus.
  7. 8. A collection of thread-like hyphae in a fungus.
  8. 10. A single-celled fungus.
  9. 11. A protoctist that has features similar to plant cells e.g. chloroplasts.
  10. 12. An organelle which is the site of photosynthesis.
  11. 13. Long filaments of a fungus that contain many nuclei.
  12. 14. A type of cell found in bacteria that does not contain a nucleus.
  13. 17. A multicellular fungus that has a hyphal structure.
  14. 20. An infectious virus that weakens the immune system and can lead to AIDS (acquired immunodeficiency syndrome).
  15. 23. A widespread plant pathogen affecting many species of plants which produces a mosaic pattern on the leaves. It infects chloroplasts and limits plant growth.