______ are gram-negative, spiral-shaped, heterotrophic bacteria that move with a corkscrew-like rotation. These bacteria live freely in the environment or have a symbiotic or parasitic relationship with other organisms.
A. Proteobacteria
B. Cyanobacteria
C. Conjugation
D. Spirochetes
E. None of the above

Question

______ are gram-negative, spiral-shaped, heterotrophic bacteria that move with a corkscrew-like rotation. These bacteria live freely in the environment or have a symbiotic or parasitic relationship with other organisms.
	A. Proteobacteria
	B. Cyanobacteria
	C. Conjugation
	D. Spirochetes
	E. None of the above

shreehari499 · Answer

D. Spirochetes are gram-negative, spiral-shaped, heterotrophic bacteria that move with a corkscrew-like rotation. These bacteria live freely in the environment or have a symbiotic or parasitic relationship with other organisms.