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ISC Biology Class 12 Syllabus For Semester (1 & 2) 2024-25

Last updated date: 23rd Apr 2024
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ISC Class 12 Biology Syllabus - Free PDF Download

Free download of ISC Class 12 Biology Syllabus as per ISC guidelines. To register online ISC tuitions on to clear your doubts and download the complete Syllabus for Class 12 Biology to prepare for Board Examinations.

Competitive Exams after 12th Science

ISC Class 12 Biology Semester Wise Syllabus 2024-25

ISC Class 12 Biology Semester (1 & 2) Syllabus 2024-25

Semester 1 

(Marks: 35)

Semester 2 

(Marks: 35)

Unit No.

Name of the Unit

Name of the Sub-Unit

Unit No.

Name of the Unit

Name of the Sub-Unit


Reproduction (Complete Unit)


Biology and Human Welfare

i. Human Health and Diseases 

ii. Strategies for enhancement in Food Production


Genetics and Evolution (Complete Unit)


Biotechnology and its Applications (Complete Unit)


Biology and Human Welfare

(iii) Microbes in Human Welfare


Ecology and Environment (Complete Unit)

Biology is a very crucial subject in order to excel in the Class 12 board examinations. Students need to have a thorough understanding of the syllabus and the most important topics to cover for the examination. The complete syllabus for the session 2024-25 is covered below: 

Unit 1. Reproduction 

(i) Reproduction in Organisms

Definition of reproduction, Modes of reproduction: asexual and sexual; Life span, the Life span of a few organisms ( banana, rise, rose, banyan, butterfly, fruit fly, tortoise, crocodile, parrot, elephant, dog, horse, and cow); Vegetative propagation; Events in sexual reproduction - pre fertilization; chromosome number; fertilization (definition, types - external and internal); post-fertilization; definition and example of parthenogenesis; differences between asexual and sexual reproduction.

(ii) Sexual Reproduction in Flowering Plants

Flower structure; development of male and female gametophytes; pollination (types, agencies, examples); pollen-pistil interaction; double fertilization; post and pre-fertilization events; the significance of seed dispersal and fruit formation; structure of microsporangium. 

iii) Human Reproduction 

Organs of the male and female reproductive system and their functions; internal structure of testis and ovary; gametogenesis- spermatogenesis and oogenesis; menstrual cycle - different phases and hormone action; fertilization, implantation, embryonic development up to blastocyst formation; pregnancy and placenta formation; parturition; lactation – hormonal control and importance.

iv) Reproductive Health

Definition and need for reproductive health and prevention of Sexually Transmitted Diseases (STDs); birth control; amniocentesis; causes of infertility and assisted reproductive technologies (VF, IUT, ZIFT, ICSI, GIFT, AI, IUI); the population explosion; contraceptives methods; definition of medical termination of pregnancy (MTP); Chromosomal theory of inheritance; chromosomal disorders. 

Unit 2. Genetics and Evolution 

Principles of inheritance and variation; Molecular basis of Inheritance; Evolution (origin of life, biological evolution, Darwin's contribution, modern synthetic theory of evolution, mechanism of evolution, Hardy - Weinberg's principle, adaptive radiation, human evolution). 

Unit 3. Biology and Human Welfare

Human health and diseases (Pathogens, parasites, and their control; concepts of immunology); Strategies for enhancement in food production (green revolution, plant breeding, tissue culture, single-cell protein, biofortification, apiculture, and animal husbandry).

Unit 4. Biotechnology and its Applications

Biotechnology - principles and processes; DNA; nomenclature; applications of biotechnology in health and agriculture.

Unit 5. Ecology and Environment 

Organisms and Populations; definition of ecology and ecological adaptations; populations attributes; populations density; Energy flow - types of food chains; nutrient cycle; biodiversity and its conservation; environmental issues.  

FAQs on ISC Biology Class 12 Syllabus For Semester (1 & 2) 2024-25

1. Where can I download the ISC syllabus for Class 12 Biology 2024-25?

You can easily download the entire syllabus from the download link mentioned in the article above. Vedantu provides the latest verified syllabus as released by the Council for Indian School Certificate Examinations (CISCE). Vedantu is your prominent online learning platform with high-quality, trustworthy study materials that help you bring out the best in examinations.

2. Where can I find ISC solutions for class 12 Biology?

Biology can sometimes get tough and students require solutions in order to refer to a given doubt or understand a problem. The solutions aid students to form a good base with the fundamentals of the subject. ISC textbooks are the best books for exam preparation. The solutions by Vedantu are designed keeping in mind the language and simplicity of explanations that are given in the ISC textbooks.

3. Does Vedantu provide ISC sample papers?

Yes, ISC Sample Papers for Class 12 can be downloaded for free from here. You can access ISC Sample Paper for Class 12 Biology from here. These sample papers help you in scoring good marks in your final examinations. The sample papers hold great value to prepare you for the ISC Board exam. They are written in clear and easy-to-understand language to facilitate better understanding for students.

4. What are all topics to cover in Unit 5 - Environment Issues of ISC Class Biology?

Definition of pollution and pollutants, air pollution and its control, noise pollution: harmful effects and control, agrochemicals, solid waste management, radioactive waste management, climate change, and the greenhouse effect, ozone layer depletion, deforestation, e-waste, waste management, the impact of global warming, ozone hole, case studies: Chipko Movement, Joint Forest Management, the contribution of Ahmed Khan of Bangalore.

5. How to score well in the ISC Biology board examination?

Follow your textbook along with the reliable study material at Vedantu that covers all the topics from your syllabus. To score good marks in Biology, you need to have a crystal clear understanding of the topics and also memorize the same. Revision notes are extremely effective to remember the concepts. In the examination, write your answers in bullet points and give pictorial/graphical illustrations (diagrams, tables, charts, etc). Last but not the least, have confidence in yourself. All the very best!