Which antibody is concentrated in the respiratory tract?

A. IgD
B. IgG
C. IgA
D. IgE
E. IgM


Answer: C

Biology & Microbiology

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The mode of transmission of A. denitrificans can best be described as:

a. person-to-person contact. b. exposure to contaminated water. c. contaminated fluids or medical solutions. d. close contact with animals.

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Somatostatin functions to inhibit both insulin and glucagon

Indicate whether the statement is true or false

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What are considered to be the two most important factors that have been involved in past mass extinctions?

a. disease and parasites b. fire and weather events c. glaciers and earthquakes d. environmental and biological factors e. plate tectonics and climatic factors

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Why do living organisms have the potential for errors (mutations and/or variations) in their development?

a. so that organisms may contribute to evolution b. so that organisms may live unchanged c. so that organisms may die unchanged d. so that organisms may contribute to reproduction

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