CBSE Class 9 : Highly Expected Topics for Biology

By Renuka Miglani|Updated : February 19th, 2021


Biology is huge and it’s hugely important as well. Out of physics, chemistry and biology, one can definitely say that biology is the most scoring of them all. You can also achieve 100% marks in all the biology questions with very easy strategy and preparations. But when we hear about biology, the first thing that comes to mind is cramming. Biology is not something that can only be learned by cramming. In fact, there are some very important topics which have a very high chance of coming up in the question paper. Students must prepare at least one topic thoroughly by heart to ensure they score best out of three subjects. 

Most Important Topics of Biology for CBSE Class 9 :-

BYJU'S Exam Prep brings here a collection of all the important topics and highly weightage topics from each chapter of Biology for Class 9. With all these topics in one place you will find it easy to prepare all the chapters in a short period of time. This will also help you to summarise the vast syllabus of Class 9 Biology and help you to ace your upcoming Class 9 CBSE Biology exam.


We at BYJU'S Exam Prep have carefully monitored the last 10 year of question papers and prepared a list of most expected topics that you’ll definitely find in your question paper. Please see the list below to get the answers.


Chapter Wise Important Topics for CBSE Class 9 Biology

Here is the chapter wise distribution of important topics to help you ace your Class 9 Biology exam.


The Fundamental Unit of Life

Osmosis, Diffusion, Endocytosis, Exocytosis, genetic material, structures and functions of cell organelles, differences between eukaryotes and prokaryotes.



Difference between meristematic and permanent tissues, xylem and phloem, plant vs animal tissue, types of animal tissue, simple tissue diagrams, structure of neuron.


Why do We fall ill?

Vaccine, Definition of Health vs Disease Free, Principle of antibiotic, types of pathogen, manifestation of pathogen, immunity.


Natural Resources

Major Natural Resources, Functions, Pollution, Biogeochemical Cycles.


As seen from the above listed topics, these are the topics that one must prepare without fail. You will find 90% of the biology questions are covered from these topics easily. Take all the necessary time to thoroughly revise these questions and try to solve as many problems as you can from the above mentioned topics.



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  • There are total of 6 chapters in CBSE Class 9 biology syllabus

    Chapter 5 - Fundamental Unit of Life.

    Chapter 6 - Tissues.

    Chapter 7 - Diversity In Living Organisms.(Omitted from 2020-2021 exam syllabus)

    Chapter 13 - Why Do We Fall Ill ?

    Chapter 14 - Natural Resources. (Can be covered under Chemistry also)

    Chapter 15 - Improvements In Food Resources. (Omitted from 2020-2021 exam syllabus)

  • Tissues, Diversity in Living organisms and The fundamental unit of life can be considered as the most challenging chapter in complete biology syllabus for class 9. These chapters contain quite a lot of new concepts, terms, definitions and diagrams that can be potential challenges for students.

  • Why do we fall ill, improvement in food resources and the fundamental unit of life can be considered as the most scoring chapters.

  • As Biology is a relatable subject to all living organisms, we must read and revise its topics frequently so that they do not slip from our brain and become a worry during the examinations because the questions asked are pretty straightforward and easier than the Physics and Chemistry questions.

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