An Early Attempt by Cohn at Bacterial Classification Grouped Bacteria

Question

An early attempt by Cohn at bacterial classification grouped bacteria according to their
A) biochemistry.
B) Gram stain.
C) shape.
D) arrangement.
E) size.

Accepted Answer

Cohn's early attempt at bacterial classification was based on the physical characteristics of bacteria, particularly their shape. He classified them into four major groups based on their shape: spherical (cocci), rod-shaped (bacilli), helical (spirilla), and curved (vibrios). The Gram stain, biochemistry, arrangement, and size were not yet developed or widely used for bacterial classification during Cohn's time.