The contents of a bottle labeled "Tincture of iodine" is
A) an alcohol solution of iodine.
B) a variety of organic compounds containing iodine.
C) also known as betadine.
D) a mixture of iodine and chloramine.
E) a detergent solution of iodine.
A
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Nori, used to wrap sushi, is:
a. red algae b. green algae c. brown algae d. golden algae e. diatoms
Identify the functional group that denotes an alcohol.
A) R-OH B) R=R C) R-NH2 D) R-COOH
In an aquatic ecosystem, a secondary carnivore is temporarily excluded and then, after a period of time, is returned. Which one of the following is NOT an expected top-down effect after it is returned?
A. Algae decrease. B. Primary carnivores become less abundant. C. Primary productivity increases. D. Herbivores become more abundant.