Explore: All CBSE Class 12 chapters · CBSE Class 12 Biology PYQs · CBSE Class 12 hub · Syllabus & pattern · Class 12 2026
Answer first
Biodiversity and Conservation PYQs (previous year questions) for CBSE Class 12: Biodiversity and Conservation (Biology) had 13 questions across the 50 official CBSE Class 12 papers we tagged (2016–2026), and appeared in 8 of them. Asked in 8 of 10 years. The concepts asked in the most papers: Loss of Biodiversity, Patterns of Biodiversity, Biodiversity Conservation.
Year-wise question count
Asked in 8 of 10 years.
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Loss of Biodiversity | 3 | 3 | 2025, 2022, 2020 |
| Patterns of Biodiversity | 3 | 3 | 2024, 2023, 2022 |
| Biodiversity Conservation | 3 | 2 | 2026, 2019 |
| Ecosystem Services | 1 | 1 | 2019 |
| Levels of Biodiversity | 1 | 1 | 2018 |
| Mass Extinctions | 1 | 1 | 2022 |
| Megadiversity | 1 | 1 | 2023 |
How to practise Biodiversity and Conservation PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Biodiversity and Conservation questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.
CBSE Class 122026
CBSE Class 122025
- Q.24 (Biology (57/1/1)) · Short answer · Loss of Biodiversity: Examples of biodiversity loss causes; value of Red List and hotspots PDF
CBSE Class 122024
- Q.29 (Biology (57/1/1)) · Case-based · Patterns of Biodiversity: Mammal richness across regions, latitudinal pattern, prokaryote estimates PDF
CBSE Class 122023
CBSE Class 122022
- Q.6 (Biology Term 2 (57/1/1)) · Short answer · Loss of Biodiversity: Interpret rising shark harvest data and its effect on biodiversity PDF
- Q.7 (Biology Term 2 (57/1/1)) · Short answer · Patterns of Biodiversity: Place countries by mammal richness; name the latitudinal diversity pattern PDF
- Q.8 (Biology Term 2 (57/1/1)) · Short answer · Mass Extinctions: Number of mass extinctions so far and how the current one differs PDF
CBSE Class 122020
- Q.17 (Biology (57/1/1)) · Short answer · Loss of Biodiversity: Alien species invasion with example; three other causes of loss PDF
CBSE Class 122019
CBSE Class 122018
- Q.21 (Biology (57/1)) · Short answer · Levels of Biodiversity: India versus Norway ecosystem diversity; genetic vs species diversity PDF
Other Biology chapters
- Reproduction in Organisms PYQs
- Sexual Reproduction in Flowering Plants PYQs
- Human Reproduction PYQs
- Reproductive Health PYQs
- Principles of Inheritance and Variation PYQs
- Molecular Basis of Inheritance PYQs
- Evolution PYQs
- Human Health and Disease PYQs
- Strategies for Enhancement in Food Production PYQs
- Microbes in Human Welfare PYQs
- Biotechnology: Principles and Processes PYQs
- Biotechnology and its Applications PYQs
- Organisms and Populations PYQs
- Ecosystem PYQs
- Environmental Issues PYQs
FAQ
How many Biodiversity and Conservation questions come in CBSE Class 12?
In the official papers we tagged: 2 in 2026, 1 in 2025, 1 in 2024, 2 in 2023, 3 in 2022, 1 in 2020, 2 in 2019 and 1 in 2018. Not asked in the other 2 years. That is 13 questions in all, about 5% of Biology.
Which Biodiversity and Conservation topics repeat in CBSE Class 12?
Asked in the most papers: Loss of Biodiversity, Patterns of Biodiversity, Biodiversity Conservation. The concept table lists every one with its count.
Are these official CBSE Class 12 questions?
Yes. Every question is from an official CBSE Class 12 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.