Are you preparing for the 12th Biology 2nd Mid Term Examination 2026-2027? Easy Education Tips brings you a useful collection of chapter-wise important questions for Tamil Nadu State Board Class 12 students. This study material covers both Bio-Botany and Bio-Zoology subjects, including important textbook question numbers and 2 Marks, 3 Marks and 5 Marks topics.
Students can use this question collection to revise important chapters, understand key concepts and practise important textbook exercises before the examination. Download the PDF and prepare effectively for your upcoming 12th Standard Biology examination.
🌱 BIO-BOTANY – Important Questions
Chapter 6
Important Book Back Question Numbers:
21, 22, 23, 25, 27, 33, 35, 39, 40, 41, 42, 45, 46, 47, 48, 51, 53, 54
Chapter 7 – Ecosystem
Important Question Numbers: 15, 16, 17, 18, 19, 20, 21, 24
Important Topics:
- Laws of Thermodynamics
- 7.2.5 – Food Chain and Types
- 7.2.6 – Food Web and Significance
- 7.2.7 – Types of Ecological Pyramids
- Structure of Pond Ecosystem
- How to Protect Ecosystem?
- 7.3.1 – Characteristics of Ecological Succession
- 7.3.2 – Types of Succession – Hydrosere
- 7.3.4 – Significance of Plant Succession
Chapter 8 – Environmental Issues
Important Question Numbers: 12, 13, 14, 15, 16, 17, 18, 20
Important Topics:
- 8.1.1 – Effects of Global Warming (2 Marks)
- 8.1.5 – Effects of Ozone Depletion (3 Marks)
- 8.2.3 – Major Activities of Forestry Extension Centres (5 Marks)
- 8.3 – Effects of Deforestation (5 Marks)
- 8.3 – Objectives of Afforestation (5 Marks)
- 8.7 – Write a Note on LCS
- 8.9 – Benefits of EIA
- 8.9.1 – Biodiversity Impacts
- Importance of GIS
- Remote Sensing – Definition and Uses
Chapter 9 – Plant Breeding
Important Question Numbers: 19, 20, 21, 23, 24
Important Topics:
- 9.5.1 – Objectives of Plant Breeding
- Steps in Hybridization (5 Marks)
- Types of Hybridization (5 Marks)
🐾 BIO-ZOOLOGY – Important Questions
Chapter 9
Important Question Numbers: 12, 14, 17, 20, 21, 22, 27, 28
Chapter 10
Important Question Numbers: 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32
Chapter 12 – Environmental Issues
Important Question Numbers: 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
Important 5 Marks Topics:
- 12.2.2 – Effects of Air Pollution
- 12.2.4 – Control of Air Pollution
- 12.5 – Effects of Agro-Chemicals
- 12.7.1 – Wastewater Treatment
- 12.9.2 – Radioactive Waste
- 12.9.3 – Medical Waste
- 12.9.4 – E-Waste
Additional Important Topics:
- Essential Properties of Water
- Adaptations in Animals (5 Marks)
📥 Download 12th Biology Important Questions PDF
Students can download the complete Bio-Botany and Bio-Zoology 2nd Mid Term Important Questions PDF for the 2026-2027 academic year using the button below. Save the PDF and use it as a revision guide for your examination preparation.
📌 Preparation Tips for Students
- Revise all the listed textbook question numbers.
- Prepare important 5 Marks answers with diagrams wherever required.
- Practise 2 Marks and 3 Marks questions regularly.
- Study important definitions, scientific terms and examples.
- Revise both Bio-Botany and Bio-Zoology separately.
- Refer to your prescribed textbook for complete answers.
Important Note: The listed question numbers and topics are provided as examination revision guidance based on the supplied video notes. They are not official or guaranteed examination questions. Verify the question numbers with your prescribed textbook.
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