ICSE Class 10 Biology Syllabus 2026-27: Latest Changes Analysis

The ICSE Class 10 Biology Syllabus 2026-27, prescribed by CISCE, focuses on building a strong conceptual understanding of key topics like plant physiology, human anatomy, genetics and reproduction. It offers a balanced mix of theory and practical learning.

With emphasis on diagrams, processes and reasoning-based questions, the syllabus helps students develop clarity and analytical skills, making Biology a scoring subject with proper preparation.

ICSE Class 10 Biology Syllabus Download (2026-27)

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Overview: ICSE Class 10 Biology Syllabus 

The ICSE Class 10 Biology syllabus 2026-27 focuses on building a strong understanding of life-processes, human physiology, plant systems, genetics, environment and health-related concepts. 

ICSE Class 10 Key Highlights for 2026-27

Let us see what we have in store for ICSE Biology syllabus class 10:

• 80 marks theory paper (2 hours) + 20 marks Internal Assessment
• 6 chapters: Basic Biology to Pollution (no deletions or additions)
• Emphasis on diagrams, balanced equations & practical-based questions
• Practical work compulsory: mitosis, diffusion, osmosis, transpiration, photosynthesis & organ models
• Aims: economic importance, sustainability, interdependence of life & environment
• Same syllabus as 2025-26 (no changes) 

ICSE Class 10 Biology 2027 Unit-wise Marks Bifurcation 

Class 10 ICSE Biology 2026 syllabus follows the already existing structure of marks distribution. To understand it better, go through the table below. 

ICSE Class 10 Biology Chapter Sub Units 

The chapters in Class 10 ICSE Biology Syllabus are further divided into subtopics. The subtopics cover every important aspect of the chapter they are associated with. Complete bifurcation of the subtopics are given below.

1. Basic Biology

• Cell Cycle and Cell Division (Interphase, Mitosis, Meiosis basics)
• Structure of chromosome (chromatin, chromatid, gene, centromere)
• Genetics (Mendel’s laws, monohybrid & dihybrid crosses, sex-linked inheritance)

2. Plant Physiology

• Absorption by roots (imbibition, osmosis, root pressure, ascent of sap)
• Transpiration (process, significance, experiments, stomatal mechanism)
• Photosynthesis (light & dark reactions, experiments, carbon cycle)
• Chemical coordination in Plants (growth regulators & tropic movements)

3. Human Anatomy and Physiology

• Circulatory System (blood, heart, vessels, double circulation, blood groups)
• Excretory System (kidney, nephron, ultra-filtration)
• Nervous System (neuron, brain, spinal cord, reflex action, sense organs – eye & ear)
• Endocrine System (glands, hormones, feedback mechanism)
• Reproductive System (organs, fertilisation, placenta, menstrual cycle)

4. Population

• Population explosion in India, causes, problems & control measures

5. Human Evolution

• Human ancestors & evolutionary characteristics
• Lamarck’s theory & Darwin’s theory of natural selection

6. Pollution

• Types & sources of pollution (air, water, soil, noise, radiation, biomedical)
• Biodegradable & non-biodegradable wastes
• Effects & control measures (global warming, acid rain, ozone depletion, Swachh Bharat)

Internal Assessment

• Plant experiments: mitosis slides, diffusion, osmosis, transpiration, photosynthesis
• Animal identification: urinary system, heart, kidney, brain, blood cells, ear, eye, endocrine glands (models/charts)

ICSE Class 10 Deleted Chapters: Biology 

As per the new syllabus for ICSE by CISCE for the academic session 2026-27, there are no deletions in the chapters and the sub topics. The only transformation seen is in the transfer of skills. 

Tips to Prepare for ICSE Class 10 Biology Exams

Preparing for ICSE Class 10 Biology demands strong conceptual clarity, regular revision, and excellent diagram practice. Follow these smart strategies to score 90+ marks.

1. Master Concepts & Labelled Diagrams: Focus on understanding processes deeply and practise neat, fully-labelled diagrams from Human Anatomy & Physiology and Plant Physiology chapters.

2. Learn Precise Definitions: Use accurate biological terms in every answer - ICSE rewards technical vocabulary and concise writing.

3. Make Short Notes for Quick Revision: Create crisp notes for key processes, experiments, differences, and diagrams so you can revise the entire syllabus in 2–3 days.

4. Solve Previous Year Papers & Specimen Papers: Practise at least 8–10 past papers to master the exact exam pattern, time management, and answer-writing style.

5. Prepare Practicals Thoroughly: Be perfect with all experiments (osmosis, transpiration, photosynthesis, mitosis) and specimen identification - they carry 20 marks.

How to Score Full Marks in Internal Assessment

Many students take internal assessment lightly, but this is actually the easiest 20 marks to secure before the board exams. Here’s how to score full marks smartly:

• Submit before the deadline. Teachers notice discipline and consistency. Early submission leaves a strong impression.
• Maintain a clean, uniform practical file. Same pen, proper margins, neat headings; presentation silently adds value.
• Rewrite unclear diagrams at home. Don’t keep rough lab sketches. Redraw them neatly with proper labels and scale.
• Memorize experiment principles, not just procedures. During viva, teachers often twist basic concepts.
• Use correct biological terms in viva. Saying “blood pipe” instead of “artery” - not impressionable.
• Revise common viva questions weekly. Don’t wait till the final practical exam.
• Be confident while answering. Even if unsure, answer logically instead of staying silent.
• Keep your record file updated after every experiment. Backlog creates stress and careless mistakes.

Internal assessment is about consistency, clarity and confidence and not last-minute preparation.

FAQs

Q1. What is the weightage for ICSE Biology Class 10 2026?

Ans. The exam consists of 80 marks theory paper and 20 marks internal assessment, including practicals, project work and viva.

Q2. How many hours a week should you study for biology?

Ans. Ideally, 5–7 hours per week is sufficient if you study consistently. Increase time during exams for revision and diagram practice.

Q3. Has the ICSE Class 10 Biology syllabus changed for 2026-27?

Ans. No, there are no changes in the 2026-27 syllabus. It remains the same as the previous academic session.

Q4. Which chapters are most important for scoring high in Biology?

Ans. Human Anatomy, Plant Physiology and Genetics are high-weightage and frequently asked in exams.

Q5. What type of questions are asked in the ICSE Biology exam?

Ans. The paper includes short answers, long answers, diagram-based and reasoning-based questions.