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
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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
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.
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.
Which dispersion pattern is most likely to be seen in animals that live in social groups?
1.Clumped 2.Integrated 3.Random 4.Uniform