Johne's disease, that primarily affects the small intestine of ruminants, is caused by:

A. Mycobacterium tuberculosis
B. Mycobacterium avium subspecies paratuberculosis
C. Mycobacterium bovis
D. Mycobacterium bacteremicum


Ans: B. Mycobacterium avium subspecies paratuberculosis

Biology & Microbiology

You might also like to view...

In a synapse, a neurotransmitter is released _____

A) in response to an action potential depolarizing the presynaptic membrane B) when threshold potential is reached C) when enough voltage-gated sodium channels open to release calcium into the synapse D) through gap junctions joining the synaptic membranes

Biology & Microbiology

Although Lamarck's hypothesis was wrong, it is significant. Why?

What will be an ideal response?

Biology & Microbiology

Action potentials in muscle fibers cause

a. the sarcoplasmic reticulum to release ATP. b. the sarcoplasmic reticulum to release calcium. c. myosin-actin bonds to break. d. the energizing of myosin molecules. e. all of these to occur.

Biology & Microbiology

The phenomenon whereby a small number of species diversify into a much larger number of species, able to live in a wide diversity of habitats is known as:

a) mass extinction. b) microevolution. c) adaptive radiation. d) colonization. e) background extinction.

Biology & Microbiology