Practice Quiz

IB Biology Exam Prep - Question List

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66.
A laboratory investigation requires students to dispense 5 mL of a 1 molar sodium chloride solution. Which of the following pieces of laboratory glassware should the students use to achieve the most precise measurement?
  1. 5 mL graduated beaker.
  2. 10 mL graduated cylinder.
  3. 15 mL graduated conical flask.
  4. 20 mL graduated test tube.
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67.
An excess of a chemical measured out for use in a laboratory experiment should be:
  1. Returned to the original stock.
  2. Reported on a Material Safety Data Sheet form.
  3. Disposed of according to state guidelines.
  4. Labeled and set aside for use in the future.
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68.
Which of the following factors was primarily responsible for the initial increase in O2 in the earth's atmosphere?
  1. The escape of gases from volcanoes.
  2. The emergence of multicellular organisms.
  3. The photosynthesis of cyanobacteria.
  4. The condensation of water into oceans.
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69.
Scientists have developed plants that contain genes from microbes to help them kill insects. Some people are concerned that transgenic agricultural crops might transfer genes to other species. Which of the following is the basis for this concern?
  1. Plant genes have promoter sequences that are similar to those of microbes.
  2. Transgenic plants may be unusually susceptible to native diseases.
  3. Most microbes are known to exchange DNA through conjugation.
  4. Transgenic DNA is designed to be incorporated into new genomes.
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70.
A story in a newspaper reports that post-surgical patients who received a type of alternative therapy involving light touching of the body report less severe pain than those who did not receive the therapy. The story concludes that this therapy should be adopted in all hospitals. Which information would be most useful to a reader in assessing the validity of this conclusion?
  1. The percentage of patients in all hospitals who report that they have experienced severe pain after undergoing surgery.
  2. The estimated cost to hospitals of providing the alternative therapy to all of their postsurgical patients.
  3. The percentage of patients reporting reduced pain after receiving other widely used treatments such as traditional massage or talking with staff.
  4. The level of pain reported by post-surgical patients before and after they received the alternative therapy.
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