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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.

11Papers
11Years
152Questions
1Topics

Evolution question pattern

Every graph below is calculated only from this selection.

Questions by year

Year-wise coverage for Evolution. Each bar uses a separate theme-derived color.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 93 61.2%
Medium 58 38.2%
Hard 1 0.7%

Question type distribution

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

MCQ 118 77.6%
MSQ 17 11.2%
Numerical Answer Type (NAT) 13 8.6%
Fill in the blanks 4 2.6%

Subject weightage

Top subjects by unique question coverage.

Ecology and Evolution
152 Qs

Most asked topics

Top topics across the included previous year papers.

Evolution
152 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Population and Quantitative Genetics
39 Qs
Fundamentals
36 Qs
Molecular Evolution and Phylogenetics
31 Qs
Diversity of Life
22 Qs
Interactions
13 Qs
Macroevolution
7 Qs
Life History Theory
4 Qs

Paper coverage

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

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.

39 questions11 papers11 years

Fundamentals

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

36 questions10 papers10 years

Molecular Evolution and Phylogenetics

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

31 questions11 papers11 years

Diversity of Life

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

22 questions9 papers9 years

Interactions

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

13 questions7 papers7 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.

4 questions4 papers4 years

Included previous year papers

Newest papers appear first. Sort by year, question coverage or name.

PaperYear / sessionQuestions in this viewOpen
Ecology and Evolution (EY) 2025202518View paper
Ecology and Evolution (EY) 2024202414View paper
Ecology and Evolution (EY) 2023202312View paper
Ecology and Evolution (EY) 2022202218View paper
Ecology and Evolution (EY) 2021202115View paper
Ecology and Evolution (EY) 2020202015View paper
Ecology and Evolution (EY) 2019201914View paper
Ecology and Evolution (EY) 2018201815View paper
Ecology and Evolution (EY) 2016201616View paper
Ecology and Evolution (EY) 201520153View paper
Ecology and Evolution (EY) 2014201412View paper

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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