All of the following might bring about the removal or destruction of bacteria by binding to antigens on bacterial surfaces EXCEPT ________.
A. antitoxins
B. complement-fixing antibodies
C. agglutinins
D. opsonizing antibodies
Answer: A
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The oxygen minimum layer is found
a. in the ocean trenches. b. mid-ocean. c. just below the sunlit surface. d. at the surface. e. just above the abyssal plain.
Which of the following is not an advantage of genetically engineered plants?
Select one: a. decreased yield b. herbicide resistance c. salt tolerance d. drought tolerance e. disease protection
Characters such as height, weight, and skin color are controlled by many genes acting together. These are examples of:
A) multiple alleles. B) codominance. C) polygenic inheritance. D) incomplete dominance.
Which of the following antibiotics is an inhibitor of DNA gyrase?
A) ethambutol B) ciprofloxacin C) tobramycin D) neomycin