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IBBiologySLExam QuestionsToolsTool 2: Technology

Syllabus Edition

First teaching 2023

First exams 2025

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Tool 2: Technology (SL IB Biology)

Exam Questions

23 mins8 questions

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Tool 2: Technology

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Tool 2: Technology

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1
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How could levels of dissolved oxygen in a pond be measured?

  • pH indicator

  • Turbidity meter

  • Electronic sensor

  • Clinometer

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2
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 How can the tidal volume of the lungs be measured?

  • Spirometer

  • Inhaler

  • Data logger

  • Oxygen meter

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3
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What is the most efficient way to compare the genome sizes of different species?

  • Read scientific articles and extract relevant information.

  • Extract information from an online database.

  • Compare the chromosome number of the different species.

  • Compare the proteome size of the different species.

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1
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Data models can be used in the study of populations.

Which of the statements relating to data models is/are correct?

I.
Models can incorporate all factors affecting biological systems.
II.
Biological populations often follow the sigmoid growth curve model.
III.
Computer modelling can allow scientists to make predictions about future population changes.

  • I and II only

  • I, II and III

  • II and III only

  • III only

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2
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A team of scientists used mesocosms to investigate the effect of invasive species A and B on native species of frog, toad and newt that would normally be found in a wetland ecosystem. Their mesocosms contained the frog, toad and newt species in the absence of invasive species, in the presence of each invasive species individually, and in the presence of both invasive species at the same time. 20 mesocosms, set up on land in 400 litre tanks, allowed each condition to be replicated 5 times. Some of the results are shown in the graph. The error bars show standard error.

mesocosm-invasive-species-graph-1

Which of the statements about the mesocosm experiment are correct?

  • It can be concluded that introducing species B to a wetland ecosystem would damage populations of frogs.

  • The mesocosms provide a realistic representation of the wetland habitat of the frog, newt and toad species.

  • The mesocosms provided a model that allowed data on the effect of the invasive species to be collected.

  • Invasive species B had a significant impact on all of the native amphibian species.

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