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Cambridge IGCSE Biology practice

Paper 3 structured question: Populations

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Populations

Exam-style question

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Paper 3Theory (Core)2 marks

A population of animals was monitored over time and the following data were recorded.

Data Table

Population Size Over Time

Time (months)Population Size
050
2100
4200
6400
8600
10700
12720
  1. a

    Identify Describe the trend in population size from 0 to 6 months.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State Suggest why the population growth slows between 8 and 12 months.

    Aim for approximately 1 distinct marking point.

    [1]

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Paper 3 structured question: Populations

Paper 3Theory (Core)2 marks

Diagram Description

Population Growth Curve

A graph shows population size on the y-axis and time on the x-axis. The curve starts slowly, then rises steeply, and finally levels off forming an S-shape.

  1. a

    Identify What type of population growth is shown by the S-shaped curve?

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    State Give one reason why the population growth levels off at the top of the curve.

    Aim for approximately 1 distinct marking point.

    [1]