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  1. Scanning electron micrograph of HIV particles infecting a human T cell
  2. Common Dolphins
  3. Conceptual image of DNA
  4. Cyanobacteria, SEM
  5. Conceptual image of DNA
  6. Animal Cell, Illustration
  7. Pond life
  8. Normal wrist, X-ray.
  9. Scanning electron micrograph of an apoptotic HeLa cell
  10. Conceptual image of platelets with red blood cells
  11. Liver proteins
  12. Parasitic Wasp Head, SEM
  13. Conceptual image of DNA
  14. Microglial White Blood Cell, SEM
  15. Cell
  16. Chrysanthemum flower bud light micrograph
  17. Antibody, artwork
  18. Common House Mosquito, SEM
  19. C-reactive protein, molecular models
  20. Antibiotic destroying a bacterium
  21. Conceptual image of DNA
  22. Dog Flea Head, SEM
  23. Colorized scanning electron micrograph of filamentous Ebola virus particles
  24. Legionella bacteria
  25. Cartilage cells, TEM
  26. Paramecium protozoa, light micrograph
  27. Microscopic view of human antibodies with red blood cells
  28. Electronic and biologic systems, artwork
  29. Conceptual image of DNA
  30. Cellular Protein Transport, Illustration
  31. Dicotyledon Root, SEM
  32. Thornback Ray, X-Ray
  33. Conceptual image of platelet, red blood cell and white blood cell
  34. Cell
  35. Nerve demyelination, TEM
  36. Metabolic enzyme, artwork
  37. Ladybug Beetle, SEM
  38. Beetles With Metallic Iridescence
  39. Anopheles Gambiae, Mosquito Malaria Carrier, SEM
  40. Microscopic view of blood clotting inside the artery
  41. Mosquito Egg Raft With Hatching Larvae, SEM
  42. Conceptual image of DNA
  43. Cells
  44. Spirogyra algae, light micrograph
  45. Female Mosquito, SEM
  46. Scanning electron micrograph of just-divided HeLa cells
  47. Giant Water Bug, SEM
  48. Monarch Butterfly Head, SEM