Some particles or cells cause immune responses when your body's white blood cells recognize them as foreign objects. These are known as

A. Irritants
B. Desensitizers
C. Antigens
D. Pollutants
E. Active asphyxiants


Answer: C

Environmental & Atmospheric Sciences

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What will be an ideal response?

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What is an economic decision-making tool that involves determining who/what may be affected, projecting outcomes, and then establishing who benefits or who is harmed?

A. existence value B. monetary value C. discount value D. nonuse value E. cost benefit analysis

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Which of the following materials has the highest specific heat?

A. Oceanic crust B. Continental crust C. Water D. Air E. None of these is correct.

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Indicate whether the statement is true or false

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