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Variation and Selection
Practice Questions

20 CIE IGCSE Biology questions on Variation and Selection, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Variation and Selection.

Try 2 sample questions on Variation and Selection

Question 1 · 1 mark · Difficulty 1/3

A population of beetles living on a tropical island shows a wide range of body colours from pale yellow to dark brown. Which term best describes this range of body colours?

  1. mutation
  2. continuous variation
  3. discontinuous variation
  4. natural selection
Show answer & explanation
✓ Answer: B — continuous variation
Award 1 mark for recognising that a range of colours (from pale to dark) represents continuous variation. A is incorrect — mutation is a change in DNA, not the resulting range of phenotypes. C is incorrect because discontinuous variation shows distinct categories with no intermediates. D is incorrect — natural selection is a process, not a description of variation.
Question 2 · 1 mark · Difficulty 2/3

In a population of rabbits, a mutation occurs that gives white fur instead of brown fur. The rabbits live in a forest with dark soil. What is the most likely outcome for rabbits with white fur?

  1. They will be better camouflaged and survive better
  2. They will be more visible to predators and survive less well
  3. The mutation will have no effect on survival
  4. All rabbits in the population will become white within one generation
Show answer & explanation
✓ Answer: B — They will be more visible to predators and survive less well
Award 1 mark for recognising that white fur against dark soil reduces camouflage, making rabbits more vulnerable to predation. A is incorrect — white fur is less camouflaged in a dark environment. C is incorrect — camouflage affects predation risk. D is incorrect — natural selection takes many generations and the disadvantageous allele would decrease in frequency.
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20 questions · 25 min · free

CIE IGCSE Biology: Variation and Selection FAQ

How many CIE IGCSE Biology questions on Variation and Selection are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Variation and Selection 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 Variation and Selection 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 Variation and Selection 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 Variation and Selection typically tested on CIE IGCSE Biology papers?
Variation and Selection 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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