Across
- 2. Scientist who proposed a five-kingdom classification.
- 5. Subviral particles needing a helper virus to replicate.
- 6. The study of microscopic organisms.
- 9. Type of reproduction not involving gametes.
- 11. A tiny acellular agent that causes diseases.
- 12. Disproved spontaneous generation with a meat-and-maggots experiment.
- 13. The kingdom that includes all animals.
- 16. Most specific level in biological classification.
- 19. Eukaryotic organisms that are not animals, plants, or fungi.
- 21. Not made up of or containing cells.
- 22. Microscopic organisms including bacteria, fungi, and viruses.
- 27. Scientist who first used the word “cell.”
- 28. Polymer found in bacterial cell walls.
- 31. Organism consisting of one cell.
- 33. Invented pasteurization and supported biogenesis.
- 34. Made up of cells.
- 36. Highest rank in the classification system.
- 37. Infectious RNA molecules without a protein coat.
- 38. Plant-like protists that photosynthesize.
Down
- 1. Archaea that produce methane.
- 3. Structural polysaccharide in plant cell walls.
- 4. Microbes that live in extremely hot environments.
- 7. Organisms that thrive in extreme environments.
- 8. Type of tree that shows evolutionary relationships.
- 10. Infectious proteins causing brain diseases.
- 11. Acellular infectious agents requiring a host to replicate.
- 14. Microorganisms that often live in extreme environments.
- 15. Type of cell without a nucleus.
- 17. Protein shell surrounding a virus’s genetic material.
- 18. Microbes that thrive in high salt concentrations.
- 20. Single-celled organisms without a nucleus.
- 23. Organism made up of many cells.
- 24. Spherical-shaped bacterium.
- 25. Shape of some bacteria, like Treponema.
- 26. The theory that life comes from existing life.
- 29. Cell type with a nucleus and organelles.
- 30. DNA-containing region in prokaryotic cells.
- 32. Rod-shaped bacterium.
- 33. The kingdom that includes all green, photosynthetic organisms.
- 35. Virus that causes AIDS.