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Human influences on ecosystems and biodiversity
Practice Questions

40 CIE IGCSE Biology questions on Human influences on ecosystems and biodiversity, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Human influences on ecosystems and biodiversity

Question 1 · 1 mark · Difficulty 1/3

Which of the following is the most accurate definition of biodiversity?

  1. The total number of individual organisms living in a habitat
  2. The total biomass of all organisms in an ecosystem
  3. The variety of different species living in a particular area
  4. The number of producers present at the base of a food chain
Show answer & explanation
✓ Answer: C — The variety of different species living in a particular area
Biodiversity refers to the variety of different species present in an area. Option A describes abundance, not variety of species. Option C refers only to producers and ignores all other organisms. Option D describes total biomass, which is a measure of productivity, not species variety.
Question 2 · 1 mark · Difficulty 1/3

Which human activity directly reduces biodiversity by destroying the physical habitat of many species simultaneously?

  1. Rotating crops between different fields each season
  2. Large-scale deforestation for agricultural land
  3. Controlled burning of small crop residues on farmland
  4. Selective fishing using nets with large mesh sizes
Show answer & explanation
✓ Answer: B — Large-scale deforestation for agricultural land
Large-scale deforestation removes the complex structural habitat of forests, eliminating food sources, nesting sites and microclimates for numerous species simultaneously, directly reducing biodiversity. Selective fishing with large mesh sizes is a conservation measure that reduces bycatch. Controlled burning of crop residues has localised, managed impact. Crop rotation improves soil health and does not typically destroy habitats on a large scale.
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CIE IGCSE Biology: Human influences on ecosystems and biodiversity FAQ

How many CIE IGCSE Biology questions on Human influences on ecosystems and biodiversity are there on Kramizo?
Kramizo currently has 40 exam-board-aligned practice questions on Human influences on ecosystems and biodiversity for CIE IGCSE Biology, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CIE paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CIE IGCSE students preparing for Biology?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Human influences on ecosystems and biodiversity practice with other Biology topics or even switch to a totally different CIE subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Human influences on ecosystems and biodiversity questions aligned to the official CIE IGCSE Biology syllabus?
Every question is written against the published CIE IGCSE Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CIE paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from CIE.
How is Human influences on ecosystems and biodiversity typically tested on CIE IGCSE Biology papers?
Human influences on ecosystems and biodiversity appears across multiple question types on real CIE IGCSE Biology papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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