Which of these diseases involves the destruction of the myelin sheath on certain neurons within the brain and spinal cord?
A) depression
B) Alzheimer's disease
C) Parkinson's disease
D) multiple sclerosis
D
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Enterotoxins are ________.
A. proteins B. exotoxins C. toxins that target the intestines D. virulence factors E. All of the choices are correct.
A person working with plants may reduce the inhibition of apical dominance by auxin via which of the following?
a. pruning shoot tips b. deep watering of the roots c. fertilizing d. treating the plants with auxins e. feeding the plants nutrients
Reed-Sternberg cells are present in Hodgkin’s lymphoma.
Fill in the blank(s) with the appropriate word(s).
Polar molecules
A) have an equal distribution of electric charge. B) are always ions. C) have an overall negative electric charge. D) have an unequal distribution of electric charge. E) have an overall positive electric charge.