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Previous year question hub

Applied Ecology & Evolution - Ecology and Evolution Previous Year Questions

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

10Papers
10Years
36Questions
1Topics

Applied Ecology & 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 25 69.4%
Medium 11 30.6%

Question type distribution

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

MCQ 30 83.3%
MSQ 6 16.7%

Subject weightage

Top subjects by unique question coverage.

Ecology and Evolution
36 Qs

Most asked topics

Top topics across the included previous year papers.

Applied Ecology & Evolution
36 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Global Change
17 Qs
Biodiversity and Conservation
14 Qs
Disease Ecology and Evolution
5 Qs

Paper coverage

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

Ecology and Evolution (EY) 2026
2 Qs
Ecology and Evolution (EY) 2025
2 Qs
Ecology and Evolution (EY) 2024
4 Qs
Ecology and Evolution (EY) 2023
6 Qs
Ecology and Evolution (EY) 2022
3 Qs
Ecology and Evolution (EY) 2021
6 Qs
Ecology and Evolution (EY) 2020
1 Qs
Ecology and Evolution (EY) 2019
4 Qs
Ecology and Evolution (EY) 2018
2 Qs
Ecology and Evolution (EY) 2016
6 Qs

Browse by subtopics

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

Global Change

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

17 questions9 papers9 years

Biodiversity and Conservation

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

14 questions7 papers7 years

Disease Ecology and Evolution

Explore previous-paper coverage, trends and focused practice for Disease Ecology and Evolution.

5 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
2 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
2 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
4 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
6 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
3 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
6 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
1 questions in this view		2020
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20192019
4 questions in this view		2019
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20182018
2 questions in this view		2018
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20162016
6 questions in this view		2016
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
2018 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2018

El Niño Southern Oscillation (ENSO) events have occurred approximately every 3-7 years over the last century. The cause of these ENSO events is related to

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2
2019 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2019

Which of the following crops should show the LOWEST proportional increase in photosynthetic rate under rising carbon dioxide levels in the atmosphere?

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3
2020 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2020
In the last 3 to 4 decades, the average CO2 concentration in the Earth’s atmosphere has increased from ______.
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4
2021 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2021
The graph below shows how the lower limits of the elevational ranges of bird species on a tropical mountain have changed over 20 years (2000 to 2020) because of climate change. Each point below represents a bird species. Points would cluster on the dashed line if species had the same lower elevational range limits in 2000 and 2020. Given that the mountain summit is at an elevation of 3500 m (solid horizontal line), and assuming that the trend shown by the graph continues over the next 20 years, what would you expect in 2040?

Question diagram

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5
2024 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2024
The figure shows the time-series of atmospheric CO₂ concentration on Earth (graph not-to-scale).

Which one of the factors given is the primary reason for the sudden increase in atmospheric CO₂ concentration after 1950?

Question diagram

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6
2025 · Ecology and Evolution · Applied Ecology & Evolution · Global Change
Ecology and Evolution (EY) 2025

Mean global temperature since pre-industrial times has increased approximately by

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