• Antibiotic targets
• Antiseptic targets
• Cause of fermentation
• Cheesemakers
• Coccus and tetanus
• Fermentation aids
• Germs
• One-celled microorganisms
• Some germs
• Some microbes
• Some parasites
• Some pathogens
• Some tiny rods and spheres
• Study of Louis Pasteur
• Useful microorganisms
• Often considered plants
• Taxonomy is difficult
• Important as pathogens and for biochemical properties
• Single-celled or noncellular spherical or spiral or rod-shaped organisms lacking chlorophyll that reproduce by fission