Biology - Ecosystem
Practise 4 IAT (IISER) previous year questions on Ecosystem, compiled from papers spanning 2018 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty IAT (IISER) tests.
Ecosystem has been asked in 3 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 4 questions in all. 0% of them were easy, 100% moderate and 0% tough. Most of its questions came from 2022, with 1 question that year. In the last three years (2023–2026) it had 0 questions across 3 papers, about 0 per paper.
All of the chapter's questions come from a single topic, Functions of Ecosystem.
- 1Which one of the following statements is FALSE?2025Functions of Ecosystem
- 2Consider the following biomes: Tropical Rainforest ; Tundra ; Desert and Coastal zone . Choose the most probable descending order of Net Pri2022Functions of Ecosystem
- 3The following word diagram depicts a food chain in a forest. Which is the most likely outcome of depletion in predator population?2020Functions of Ecosystem
- 4All species of vultures in India are threatened with extinction. What is the most likely outcome if all vultures in India go extinct?2018Functions of Ecosystem
Frequently Asked Questions
1.How many questions are available for Ecosystem?
This chapter includes 4 questions compiled from IAT (IISER) papers spanning 2018 to 2025.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) questions specifically for the Ecosystem chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Ecosystem an important chapter for IAT (IISER) Biology?
Ecosystem has appeared in 4 of the 10 years of IAT (IISER) papers covered here, with 4 questions across 4 papers - about one per paper it appears in.
4.What is the difficulty level of Ecosystem questions in IAT (IISER)?
Of the 4 questions analysed for this chapter, 0% are easy, 100% moderate and 0% tough. 2022 had the most, with 1 question.
5.Which topics in Ecosystem should I focus on?
All of this chapter's questions come from a single topic: Functions of Ecosystem.
6.Is Ecosystem's weightage in IAT (IISER) going up or down?
Across all 4 papers analysed, Ecosystem has averaged about 1.0 questions per paper. In the last three years (2023–2026), that average has fallen, at about 0.0 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.