Multiple sclerosis is a result of

A) the absence of myelin on nerve cells.
B) excess amounts of myelin on nerve cells.
C) an immune system attack on nerve fibers.
D) blocking the nodes on Ranvier.
E) having excess acetylcholine receptors.


C) an immune system attack on nerve fibers.

Biology & Microbiology

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Which type of species interactions will be harmful to both species involved?

a. Mutualism b. Predation c. Herbivory d. Commensalism e. Interspecific competition

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Which scientific name is written correctly?

A. S. aureus B. Staphylococcus aureus C. Staphylococcus aureus D. Staphylococcus Aureus E. staphylococcus aureus

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The type of behavior that does not require learning or experience to be performed correctly is

A. classical conditioning. B. habituation. C. operant conditioning. D. imprinting. E. innate behavior.

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The close contact between newborns and family members allow them to become ________ with microbes that become established as their microbiota. (Choose the most accurate term.)

A) infected B) parasitized C) colonized D) contaminated E) infiltrated

Biology & Microbiology