How to Study Biology Diagrams for CBSE Class 12 Board – 2022

Diagrams play an essential role in the CBSE Class 12 Board exam, and drawing neatly organized diagrams can help you earn some extra points. Biology is all about theory, concepts and diagram, and you should know all the important diagrams in every chapter. A diagram can easily illustrate the question posed by the examiner. Draw a clean, clear diagram, label it well, and explain it in your own words and your answer is complete. Here are some essential biology charts for 12th class students. Practice well so you don’t miss a single point in the exam.

Diagrams play an important role in studying biology for Board exams. One day is not going to be enough. With the help of diagrams, students can conceptualize a topic and put it into practice visually. While learning other terms is helpful, students should also practice diagrams because it helps them record patterns for later reference to correct important features.

A good understanding of biological diagrams can improve overall productivity. Here are some tips on how to memorize biological diagrams.

Best Tips to Learn Biology Diagrams

1. Create a list of labeled parts

Refine the concept and try to memorize the labels with their functionalities. Make a list of important diagrams that include all parts of the label and specific functions.

2. Note down Important biology diagrams

Check out the previous year’s CBSE board Biology question papers and make a list of all the diagrams that appeared for the examination. You should also thoroughly complete the NCERT book and the Ncert solution for class 12 biology.

3. Don’t track down the Image

As you study, do not trace the pictures from the textbook. You can’t learn anything. This will not help you memorize the diagrams and lose marks.

4. Practice, practice, and practice every day

You can memorize even the most complex diagrams. For the CBSE Class 12 Biology diagrams, first, choose a vital diagram to practice every day. Drawing and labeling the diagram regularly will help you visualize the image. This turn will help you write your thesis during the CBSE Class 12 Board exam. You should solve important questions for class 12 biology for better preparation. 

5. Draw clean and clear diagram

Don’t forget the neatness of the diagram. Students often find themselves in a situation where they don’t get full marks for correctly naming parts. This may be due to a lack of diagrammatic skills. It’s easy to impress the examiner with clean, well-marked diagrams.

Some of the important diagrams for the CBSE Class 12 board exam 2022

1. Sexual reproduction in flowering plants

Sexual reproduction is a type of reproduction involving two different parents of the opposite sex. This type of reproduction is observed in both plants and animals. In plants, sexual reproduction occurs in flowering plants. Before we learn more about sexual reproduction in flowering plants, we need to understand the anatomy of flowers.

Sexual reproduction in flowering plants

  • Molecular basis of Inheritance

Genetics is primarily concerned with studying genes, heredity, and hereditary variation. Genes reside in chromosomes, which are made up of DNA and proteins. DNA is the molecule that carries the genetic information of all living organisms and viruses used for reproduction, function, growth, and development. It is a long polymer of deoxyribonucleotides.

DNA is made up of six molecular structures consisting of one phosphate molecule and the five-carbon sugar, deoxyribose. Nucleotides are the basic building blocks of DNA. Nucleotides are made up of one molecule of four bases, one molecule of sugar, and one molecule of phosphoric acid. The sugar-phosphate chain serves as the backbone, and the base is inside. Nucleotide subunits are linked together to form a DNA strand that provides polar stability.

Molecular basis of Inheritance

2. Human Reproduction

Human reproduction is any form of sexual reproduction that results in human fertilization. Typically, this is sexual intercourse between a sexually mature man and woman.

  • Male reproduction system

Most of the male reproductive organs are outside the body. These external organs include the penis, scrotum, and testicles. Internal organs include the vas deferens, prostate, and urethra. The male reproductive system is responsible for urination as well as sexual function.

Male reproduction system

  • Female reproduction system

The female reproductive system is designed to perform several functions. It produces female eggs necessary for reproduction called ova or oocytes. This system is designed to transport the egg to the fertilization site. Fertilization, which is fertilizing an egg by sperm, usually occurs in the fallopian tubes.

The next stage of the fertilized egg is implantation in the uterus wall, which begins the early stages of pregnancy. If fertilization and implantation do not occur, the system is designed for menstruation (rejection of the menstrual endometrium).

A woman’s reproductive system also produces female sex hormones that support the reproductive cycle.

Female reproduction system

3. Ecosystem

An ecosystem is a geographic area where plants, animals, and other organisms and weather and landscapes work together to form a life bubble. An ecosystem includes biotic or living parts and abiotic factors or non-living parts. Biological factors include plants, animals, and other organisms.


4. Biotechnology and principles

Biotechnology combines biology and technology for our improvement and sustainable development. Modern biotechnology includes genetic engineering, bioinformatics, and bioprocess engineering. Genetic engineering helps to change the genetic makeup of an organism.

Biotechnology and principles

5. Biotechnology and its applications

We use biotechnology in four main sectors: health care, agriculture, horticulture, non-food (industrial) applications in crops and other products (e.g., vegetable oils, biodegradable plastics, biofuels), and environmental protection.

Biotechnology and its applications


These are some important diagrams you need to prepare for the CBSE Class 12 Board examination. But to increase your chance, you should look at least one time each diagram available in the Ncert Book.

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button