A population is best defined as:
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Practise IGCSE 0610 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
Everything students ask about Cambridge IGCSE 0610 Populations Topical Past Papers.
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These Populations Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Biology 0610 Extended papers and grouped by the Organisms and their environment (B19.4) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
Each question is graded Easy → Medium → Hard, plus an A★ Challenge for top-grade preparation. Tap a question to mark your own answer, then unlock the examiner-style mark scheme with model solutions and examiner tips. A printable Topical Past Papers worksheet is included so you can practise offline.
Define population, community and ecosystem. Describe the factors that affect population growth (food supply, predation, disease) and identify the four phases of a sigmoid (S-shaped) population growth curve.
A population is best defined as:
Define 'community'.
[1 mark]Define 'ecosystem'.
[1 mark]Which of the following factors limit the growth of a population?
A graph of a population over time often shows a sigmoid (S-shaped) curve with four phases.
Name and describe the four phases of a sigmoid population growth curve.
[4 marks]Why does a yeast culture in a sealed flask eventually enter the DEATH phase?
Explain WHY the LAG phase of a population growth curve occurs (even when conditions look favourable).
[3 marks]Define 'carrying capacity' and explain why a population in nature usually OSCILLATES around it rather than staying exactly at it.
[2 marks]The human population worldwide is still in the EXPONENTIAL phase. Which factor has allowed humans to push past the typical carrying capacity for so long?