Which of the following make HIV such a deadly and persistent virus?

A) It attacks helper T cells.
B) It is slow acting.
C) both a and b
D) neither a nor b


C

Environmental & Atmospheric Sciences

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True or False: All major rock forming minerals are silicates

Indicate whether this statement is true or false.

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Which feature is typically found along Atlantic-type passive margins?

A) ?subsiding coast B) ?jagged rocky headland C) ?marine terrace D) ?plate boundary

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What type of cancer in children has now been found to be associated with Chernobyl?

A. breast B. thyroid C. prostate D. lung

Environmental & Atmospheric Sciences

Which direction was the ice flowing (Hint: It is bedrock.)

A) Bottom to top B) Left to right C) Top to bottom D) Right to left

Environmental & Atmospheric Sciences