Difficulty distribution
How the classified questions are distributed by difficulty.
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Practice Foraging and Reproduction - Behavioural Ecology - Ecology and Evolution previous year questions organised from real papers, with year-wise coverage and clear topic navigation.
Every graph below is calculated only from this selection.
Year-wise coverage for Foraging and Reproduction. Each bar uses a separate theme-derived color.
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.
Newest papers appear first. Sort by year, question coverage or name.
| Paper | Year / session | Questions in this view | Open |
|---|---|---|---|
| Ecology and Evolution (EY) 2025 | 2025 | 3 | View paper |
| Ecology and Evolution (EY) 2024 | 2024 | 5 | View paper |
| Ecology and Evolution (EY) 2023 | 2023 | 3 | View paper |
| Ecology and Evolution (EY) 2022 | 2022 | 2 | View paper |
| Ecology and Evolution (EY) 2021 | 2021 | 3 | View paper |
| Ecology and Evolution (EY) 2020 | 2020 | 4 | View paper |
| Ecology and Evolution (EY) 2019 | 2019 | 3 | View paper |
| Ecology and Evolution (EY) 2018 | 2018 | 3 | View paper |
| Ecology and Evolution (EY) 2016 | 2016 | 4 | View paper |
| Ecology and Evolution (EY) 2014 | 2014 | 7 | View paper |
Practice every matching question in batches of 20, with every available option.
Two sympatric species of fruit flies congregate on the fruit of two closely related species of trees for mating. The cue most likely to be used by these fly species to locate their mates from a long distance would be

According to foraging theory, if two food items are commonly available and equally abundant, an optimal forager should choose the item that

All else being equal, in a species with two sexes, which of the following is true with regard to mate choice?
Some species of spiders add additional silk ‘decorations’ to their webs. It is hypothesized that these decorations serve either to lure flies (prey) or to decrease bird (predator) attacks on the spiders. The appropriate way to test these hypotheses would be to compare numbers of
A fish species is sexually dimorphic: males possess ultraviolet (UV) spots on their bodies which are lacking in females. Females prefer males with larger and more intense UV spots as mates. Which of the following statements is a plausible reason for the spots being coloured ultraviolet?
Females in many birds and mammals mate with multiple males, in addition to their paired-male. Which of the following is an INCORRECT adaptive explanation for such extra-pair mating?
Which of the following sensory mechanisms do most frugivorous bats primarily use while foraging?
What would an evolutionary biologist hypothesize as the ultimate cause for the presence of colourful dewlaps in lizards?
Which of the figures represents the expected relationship between parental care and the number of offspring produced across taxa?

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