According to the Centers of Disease Control and Prevention, how many people die from an antibiotic-resistant infection each year?
A. 2 million
B. at least 23,000
C. at least 2,300
D. about 2 million people suffer from antibiotic-resistant infections, but no deaths have been recorded.
E. 200,000
Ans: B. at least 23,000
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Termites are insects that require the protozoan Trichonympha in their gut to synthesize the enzyme cellulase to degrade the cellulose in wood. The protozoan uses the end products of the cellulose breakdown (glucose). This is a(n) ________ relationship.
A. mutualistic B. parasitic C. commensualistic D. antagonistic
Thomas Malthus proposed that
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A) conduction B) convection C) radiation D) evaporation