Longest pathogenic Bacillus species is: (A) Bacillus subtilis, (B) Bacillus cereus, (C) Bacillus anthracis, (D) Bacillus megaterium
Answer is C. Longest pathogenic Bacillus species is Bacillus anthracis (1.2 mm width and 3-5mm long). B. anthracis causes anthrax Largest known Bacillus species is B. megaterium, (1.5 mm width and 4 mm long).