Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Mathematics and Quantitative Ecology - Ecology and Evolution previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
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Compare question counts across years.
How the classified questions are distributed by difficulty.
MCQ, numerical, multiple-select and other formats found in these papers.
Top subjects by unique question coverage.
Top topics across the included previous year papers.
Top subtopics inside this exact selection.
Question coverage for the most populated papers. Every active PYP paper remains listed below.
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| Paper name | Year | Attempt | |
|---|---|---|---|
Ecology and Evolution (EY) 20262026 | 2026 |
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Ecology and Evolution (EY) 20252025 | 2025 | |
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Ecology and Evolution (EY) 20242024 | 2024 | |
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Ecology and Evolution (EY) 20232023 | 2023 | |
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Ecology and Evolution (EY) 20222022 | 2022 | |
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Ecology and Evolution (EY) 20212021 | 2021 | |
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Ecology and Evolution (EY) 20202020 | 2020 | |
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Ecology and Evolution (EY) 20192019 | 2019 | |
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Ecology and Evolution (EY) 20182018 | 2018 | |
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Ecology and Evolution (EY) 20172017 | 2017 | |
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Ecology and Evolution (EY) 20162016 | 2016 | |
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Ecology and Evolution (EY) 20152015 | 2015 | |
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Ecology and Evolution (EY) 20142014 | 2014 | |
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A varied preview from the papers represented in this selection, with every available option.
Which of the following can be used to test differences between mean tree heights in a tropical versus a temperate forest?
In a simple linear regression, which of the following statements represents the principle underlying the estimation of the slope and intercept?