A plant species has its DNA analyzed. The results show that 28% of its nitrogen bases are guanine. What is the percent represented by thymine?
A. 22%
B. 28%
C. 56%
D. 23%
Answer: A
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The three domain classification scheme uses
A. order, phylum, class. B. plants, animals, bacteria. C. Protista, Prokaryotae, Fungi. D. Archaea, Bacteria, Eukarya
Under what circumstance would your body experience an increase in erythropoietin secretion?
A. If your hematocrit is elevated above normal levels B. After drinking 5 liters of water in just 2 hours C. If you are suffering from dehydration D. If you just moved from New York City to start training for a marathon in the "Mile-High" city of Denver, Colorado E. If you are suffering from hypertension
Why do chemical reactions tend to speed up when the concentration of the reactants is increased?
A) The reactants move faster. B) The reactants collide more often. C) The reactants have greater energy. D) All of the listed responses are correct.
Which of the following is NOT a characteristic by which a population is in equilibrium according to Hardy-Weinberg equation?
A. The population is large. B. There is no migration into or out of the population. C. There is no selection against a given genotype. D. There is no mutation in the gene being studied. E. There is nonrandom mating