Production of a neurotoxin that prevents acetylcholine release from motor neurons at neuromuscular junctions is a characteristic of ________.

A. Clostridium difficile
B. Clostridium botulinum
C. Clostridium perfringens
D. Clostridium tetani


Answer: B

Biology & Microbiology

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In a genetic cross, the _______ represent offspring with genetic combinations that were not found in the parental lines

A. P generation B. non-recombinates C. parentals D. non-parentals E. none of these

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Most coastal pollution comes from

a. oil spills from ships. b. dumping of trash. c. military disposal. d. runoff from urban and agricultural lands. e. nuclear power plants.

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The effect of parathyroid hormone on blood chemistry is most directly opposed by the effect of

a. Thyroid-stimulating hormones. b. thyroxin. c. calcitonin. d. melatonin. e. cortisol.

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Which dispersion pattern is most likely to be seen in animals that live in social groups?

1.Clumped 2.Integrated 3.Random 4.Uniform

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