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Previous year question hub

Ecology - Life Sciences Previous Year Questions

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

19Papers
19Years
40Questions
1Topics

Ecology question pattern

Every graph below is calculated only from this selection.

Questions by year

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

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 33 82.5%
Medium 7 17.5%

Question type distribution

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

MCQ 32 80%
MSQ 4 10%
Numerical Answer Type (NAT) 4 10%

Subject weightage

Top subjects by unique question coverage.

Life Sciences
40 Qs

Most asked topics

Top topics across the included previous year papers.

Ecology
40 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Ecosystems, Populations and Biogeography
37 Qs
Conservation, Biodiversity and Ecotoxicology
3 Qs

Paper coverage

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

Life Sciences (XL) 2026
4 Qs
Life Sciences (XL) 2025
2 Qs
Life Sciences (XL) 2024
2 Qs
Life Sciences (XL) 2023
1 Qs
Life Sciences (XL) 2022
1 Qs
Life Sciences (XL) 2021
1 Qs
Life Sciences (XL) 2020
2 Qs
Life Sciences (XL) 2019
2 Qs
Life Sciences (XL) 2018
2 Qs
Life Sciences (XL) 2017
3 Qs
Life Sciences (XL) 2015
1 Qs
Life Sciences (XL) 2014
4 Qs
Life Sciences (XL) 2013
3 Qs
Life Sciences (XL) 2012
2 Qs
Life Sciences (XL) 2011
1 Qs
Life Sciences (XL) 2010
4 Qs
Life Sciences (XL) 2009
2 Qs
Life Sciences (XL) 2008
1 Qs
Life Sciences (XL) 2007
2 Qs

Browse by subtopics

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

Ecosystems, Populations and Biogeography

Explore previous-paper coverage, trends and focused practice for Ecosystems, Populations and Biogeography.

37 questions19 papers19 years

Conservation, Biodiversity and Ecotoxicology

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

3 questions3 papers3 years

Included previous year papers

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

PaperYear / sessionQuestions in this viewOpen
Life Sciences (XL) 202620264View paper
Life Sciences (XL) 202520252View paper
Life Sciences (XL) 202420242View paper
Life Sciences (XL) 202320231View paper
Life Sciences (XL) 202220221View paper
Life Sciences (XL) 202120211View paper
Life Sciences (XL) 202020202View paper
Life Sciences (XL) 201920192View paper
Life Sciences (XL) 201820182View paper
Life Sciences (XL) 201720173View paper
Life Sciences (XL) 201520151View paper
Life Sciences (XL) 201420144View paper
Life Sciences (XL) 201320133View paper
Life Sciences (XL) 201220122View paper
Life Sciences (XL) 201120111View paper
Life Sciences (XL) 201020104View paper
Life Sciences (XL) 200920092View paper
Life Sciences (XL) 200820081View paper
Life Sciences (XL) 200720072View paper

Sample previous year questions

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

1
2007 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2007
Availability of free energy is maximum in which of the following trophic levels?
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2
2008 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2008
Identify the correct statements P The second law of thermodynamics is also known as the law of conservation of energy Q 'Entropy' is a measure of the available energy resulting from transformations R The transfer of energy through the food chain of an ecosystem is termed as 'energy flow' S The second law of thermodynamics deals with the transfer of energy towards more available state
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3
2009 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2009

Phagotrophs are

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4
2010 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2010
A population growing exponentially can be described by the differential equation \( dN/dt = rN \), where \( dN/dt \) represents the rate at which the whole population grows, \( N \) is the size of the population, \( r \) is the intrinsic rate of increase, and \( t \) is time. According to this equation, the per capita rate of growth is
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5
2011 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2011
Which of the following statements are INCORRECT on ecological point of view?
P. Primary succession involving xerosee is initiated in a wet habitat
Q. Halones commonly found in electronic equipment are one of the active force destroying the protective ozone layer in the stratosphere
R. Sympatric speciation occurs when the new species evolves in geographic isolation from the parent species
S. α-Diversity is the diversity of species within a habitat or community
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6
2012 · Life Sciences · Ecology · Ecosystems, Populations and Biogeography
Life Sciences (XL) 2012
Which of the following best represents the flow of energy through an ecosystem?
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