Approximately _____ species of bacteria are known to cause diseases in humans.
A. 100 B. 200 C. 300 D. 400
A. 100 B. 200 C. 300 D. 400
A. Aerobic bacteria B. Anaerobic bacteria C. Facultative bacteria D. Microaerophilic
A. Hetrotrophic bacteria B. Chemosynthetic bacteria C. Saprophytic bacteria D. Parasitic bacteria