Development of drug resistance is encouraged by ________.
A. use of two drugs simultaneously with the hope that each will prevent the emergence of resistance to the other
B. avoidance of indiscriminate use of drugs
C. widespread use of broad-spectrum drugs
D. use of a high enough concentration of the drug to destroy any spontaneous resistant mutants that might arise
E. using drugs appropriate for the infectious agent being treated
Answer: C
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A. the sum of all phenotypic variation in the population B. the average amount of genetic variation in each individual C. the proportion of variability in a population that is caused by genetic variance D. the absolute measurement of genotypic variation in a population E. the proportion of variability caused by the environment
Marina has owned a bar for many years and extols the health benefits of alcohol. Which of these claims is correct?
A) Four to five drinks per day improve the liver. B) Heavy drinking prevents cancer. C) Alcohol increases the uptake of vitamins and minerals. D) Moderate consumption raises the "good" cholesterol levels.
During the process of phosphorylation, ____.
A. a molecule gains a phosphate group B. a molecule synthesizes a phosphate group C. molecules become more stable D. molecules are passed to enzymes E. ADP is produced from ATP
In meiosis, DNA replicates during
a)prophase I. b)prophase II. c)interphase prior to meiosis II. d)interphase prior to meiosis I. e)both prophase I and prophase II.