The study of the harmful effects of chemicals on humans and other organisms is known as ____.
A. chemotherapy
B. physiology
C. epidemiology
D. toxicology
E. toxicity
Answer: D
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Which ester is formed by the reaction of CH3COOH and CH3CH2CH2OH?
A) ethyl acetate B) ethyl propanoate C) propyl acetate D) none of these
Use the following diagram to answer this question.
Which of the images would be potential sites for both active volcanoes and deep earthquakes?
A. Diagram a and b B. Diagram b and c C. Diagram c and d D. Diagram a, b, c, and d
Survival of fish in a cold winter is more favorable
A. in a shallow pond. B. a deep pond. C. either of these D. none of the above
As a result of country breezes, which of the following tends to happen to pollutants in the urban air?
A. They are concentrated. B. They are pushed to higher altitudes. C. They are pushed to rural areas. D. They are diluted.