Biology - Evolution
Practise 3 IAT (IISER) previous year questions on Evolution, compiled from papers spanning 2017 to 2021. 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.
Evolution has been asked in 3 of the 9 years of IAT (IISER) papers analysed (2017–2026), with 3 questions in all. 33% of them were easy, 67% moderate and 0% tough. Most of its questions came from 2021, with 1 question that year. In the last three years (2023–2026) it had 0 questions across 3 papers, about 0 per paper.
The chapter's 2 topics are not weighted equally: Evidences of Evolution (2 questions, 67%) and Modern Theory of Evolution (1 question, 33%) have been asked the most.
- 1Which of these factors is least likely to cause deviation from the Hardy-Weinberg equilibrium?2021Modern Theory of Evolution
- 2The following plots represent the body size distributions of a fruit fly population. Dashed lines represent the ancestral distributions and 2019Evidences of Evolution
- 3A population of finch birds with medium sized beaks colonizes an island with plants producing medium and large sized seeds. After a disease 2017Evidences of Evolution
Frequently Asked Questions
1.How many questions are available for Evolution?
This chapter includes 3 questions compiled from IAT (IISER) papers spanning 2017 to 2021.
2.Are these questions only from IAT (IISER), or from other exams too?
These are IAT (IISER) questions specifically for the Evolution chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.
3.Is Evolution an important chapter for IAT (IISER) Biology?
Evolution has appeared in 3 of the 10 years of IAT (IISER) papers covered here, with 3 questions across 3 papers - about one per paper it appears in.
4.What is the difficulty level of Evolution questions in IAT (IISER)?
Of the 3 questions analysed for this chapter, 33% are easy, 67% moderate and 0% tough. 2021 had the most, with 1 question.
5.Which topics in Evolution should I focus on?
These topics have carried the most weightage in Evolution:
- Evidences of Evolution - 2 questions (67%)
- Modern Theory of Evolution - 1 question (33%)
6.Is Evolution's weightage in IAT (IISER) going up or down?
Across all 3 papers analysed, Evolution 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.