Choices are:
a. rod b. spiral c. square d. spherical.
There are three most common bacterial cell shapes. These are:
1. cocci or coccus (spherical) (spherical, from the Greek word for seed/berry) ;
2. bacilli or bacillus (rod-shaped) (rod-shaped, from the Greek word for staff); and,
3. spirilla or spiral (twisted) (curved shape, from spiral).
Therefore the answer is square. Its letter C.
