Poultry products are a likely source of infection by
A) Helicobacter pylori.
B) Salmonella enterica.
C) Vibrio cholerae.
D) Shigella spp.
E) Clostridium perfringens.
B
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Which of the following does not influence the strength of a stimulus?
1.frequency of action potentials 2.how many axons are responding 3.size of the action potentials 4.which axons are responding
Refer to the accompanying figure. In this sequence of events, the bell is serving as:
a. a motor stimulus. b. the conditioned stimulus. c. a cognition stimulus. d. a sign stimulus. e. the unconditioned stimulus.
A substance that can elicit an immune response from a lymphocyte is called a(n) ________
A) defensive protein B) pathogen C) antibody D) antigen
Sharks
A. have a keen sense of smell. B. have dermal denticles. C. have teeth derived from epidermal scales. D. lack bony skeletons. E. All of the choices are correct.