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Previous year question hub

Evolution - Ecology and Evolution Previous Year Questions

Practice Evolution - Ecology and Evolution previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

12Papers
12Years
169Questions
1Topics

Evolution question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 107 63.3%
Medium 61 36.1%
Hard 1 0.6%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 132 78.1%
MSQ 17 10.1%
Numerical Answer Type (NAT) 16 9.5%
Fill in the blanks 4 2.4%

Subject weightage

Top subjects by unique question coverage.

Ecology and Evolution
169 Qs

Most asked topics

Top topics across the included previous year papers.

Evolution
169 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Population and Quantitative Genetics
44 Qs
Fundamentals
40 Qs
Molecular Evolution and Phylogenetics
34 Qs
Diversity of Life
23 Qs
Interactions
15 Qs
Macroevolution
7 Qs
Life History Theory
6 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Ecology and Evolution (EY) 2026
17 Qs
Ecology and Evolution (EY) 2025
18 Qs
Ecology and Evolution (EY) 2024
14 Qs
Ecology and Evolution (EY) 2023
12 Qs
Ecology and Evolution (EY) 2022
18 Qs
Ecology and Evolution (EY) 2021
15 Qs
Ecology and Evolution (EY) 2020
15 Qs
Ecology and Evolution (EY) 2019
14 Qs
Ecology and Evolution (EY) 2018
15 Qs
Ecology and Evolution (EY) 2016
16 Qs
Ecology and Evolution (EY) 2015
3 Qs
Ecology and Evolution (EY) 2014
12 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

Population and Quantitative Genetics

Explore previous-paper coverage, trends and focused practice for Population and Quantitative Genetics.

44 questions12 papers12 years

Fundamentals

Explore previous-paper coverage, trends and focused practice for Fundamentals.

40 questions11 papers11 years

Molecular Evolution and Phylogenetics

Explore previous-paper coverage, trends and focused practice for Molecular Evolution and Phylogenetics.

34 questions12 papers12 years

Diversity of Life

Explore previous-paper coverage, trends and focused practice for Diversity of Life.

23 questions10 papers10 years

Interactions

Explore previous-paper coverage, trends and focused practice for Interactions.

15 questions8 papers8 years

Macroevolution

Explore previous-paper coverage, trends and focused practice for Macroevolution.

7 questions7 papers7 years

Life History Theory

Explore previous-paper coverage, trends and focused practice for Life History Theory.

6 questions5 papers5 years

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Ecology and Evolution (EY) 20262026
17 questions in this view		2026
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20252025
18 questions in this view		2025
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20242024
14 questions in this view		2024
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20232023
12 questions in this view		2023
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20222022
18 questions in this view		2022
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20212021
15 questions in this view		2021
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20202020
15 questions in this view		2020
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20192019
14 questions in this view		2019
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20182018
15 questions in this view		2018
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20162016
16 questions in this view		2016
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20152015
3 questions in this view		2015
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20142014
12 questions in this view		2014
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2014 · Ecology and Evolution · Evolution · Fundamentals
Ecology and Evolution (EY) 2014
Darwin's ideas on evolution by natural selection were influenced by
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2
2015 · Ecology and Evolution · Evolution · Population and Quantitative Genetics
Ecology and Evolution (EY) 2015
A genetic locus has only two alleles in a population. The frequency of heterozygotes in that population is 0.32. Assuming Hardy-Weinberg equilibrium, the frequency (in decimal notation, not in fractions or percentage) of the rarer allele is __________
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3
2018 · Ecology and Evolution · Evolution · Macroevolution
Ecology and Evolution (EY) 2018
During the Pleistocene, which of the following groups experienced the largest mass extinction?
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4
2019 · Ecology and Evolution · Evolution · Molecular Evolution and Phylogenetics
Ecology and Evolution (EY) 2019

The rates of non-synonymous and synonymous change per site are dN and dS respectively. Which of the following mechanisms explains the evolution of a gene with dN/dS = 0.2?

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5
2020 · Ecology and Evolution · Evolution · Fundamentals
Ecology and Evolution (EY) 2020
Who among the following was a strong public supporter of Darwin’s theory of evolution by natural selection?
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6
2021 · Ecology and Evolution · Evolution · Fundamentals
Ecology and Evolution (EY) 2021
The theory of evolution by natural selection was proposed by which one (or more) of the following?
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