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A drug that is highly effective in treating many types of infection can,at present,be obtained only from the bark of the ibora , a tree that is quite rare in the wild. It takes the bark of 5000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibore's extinction. Which of the following,if true, most seriously weakens the arguments above ?
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Cytotoxic T cells are involved in the following functions
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Choose the one word or phrase that best keeps the meaning of original sentence if it is substituted for the under lined word or phrase. 'Salt water is often used to induce vomiting'-
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Persistent vomiting may cause