This section provides download links from Google Drive for NCERT Biology Books from Class 6 to 12th in Hindi Medium. Please Click the Hyperlink (red colour) and thereafter in Google Drive click download button given at upper right side or click three-line dotted menu (in Mobile) and thereafter click download button:
NCERT Biology Books Hindi Medium Download Links
- Class 11 NCERT Biology Book : जीव विज्ञान – जीव विज्ञान 1
- Class 12 NCERT Biology Book : जीव विज्ञान – जीव विज्ञान 2
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Introduction to Biology
Biology is one of the most fascinating and essential branches of science. It is the study of life and living organisms, including their structure, function, growth, origin, evolution, and interactions with the environment. Often described as the “science of life,” biology seeks to answer fundamental questions about what life is, how it works, and how living beings interact with one another and with their surroundings.
From the smallest microorganisms to the largest ecosystems, biology provides knowledge that is central to understanding both natural processes and human existence.
What is Biology?
The word Biology comes from the Greek words “Bios” (life) and “Logos” (study). It is a natural science that explores the physical and chemical processes of life. Unlike physics or chemistry, biology deals directly with living beings, making it an applied science with direct impact on health, agriculture, environment, and technology.
Biology tries to answer questions such as:
- How do cells function and reproduce?
- What causes diseases and how can they be cured?
- How do plants and animals interact in ecosystems?
- What is the genetic code that defines life?
Branches of Biology
Biology is a vast discipline, and to study it effectively, it is divided into many branches.
1. Zoology: Study of animals, their physiology, classification, and behavior.
2. Botany: Study of plants, including their structure, growth, reproduction, and uses.
3. Microbiology: Study of microorganisms like bacteria, viruses, fungi, and their role in health and industry.
4. Genetics: Study of heredity, genes, DNA, and how traits are passed from one generation to another.
5. Anatomy and Physiology: Anatomy deals with the structure of living beings, while physiology explains their functioning.
6. Biochemistry and Molecular Biology: Study of chemical processes in living organisms at the molecular level.
7. Ecology: Study of ecosystems, biodiversity, and the interaction between living beings and the environment.
8. Evolutionary Biology: Study of how species evolve over time through natural selection and adaptation.
9. Biotechnology: Application of biology in technology, medicine, agriculture, and industry.
Importance of Biology
Biology is not just a subject but a way to understand and improve life. Its importance can be seen in several areas:
- Healthcare and Medicine: Provides knowledge for the treatment of diseases, development of vaccines, and better healthcare systems.
- Agriculture: Helps improve crop yields, develop pest-resistant varieties, and ensure food security.
- Environmental Conservation: Guides efforts to protect biodiversity, manage ecosystems, and combat climate change.
- Biotechnology and Innovation: Leads to advancements in genetic engineering, cloning, biofuels, and pharmaceuticals.
- Understanding Evolution and Life: Helps us know the origin of species, human evolution, and adaptation processes.
- Everyday Life Applications: From nutrition to hygiene, biology directly influences how humans live healthy lives.
Importance of Biology in Government Job Competitive Exams
For aspirants preparing for UPSC, SSC, State PSCs, Railway, Defence, Teaching, and other government exams, biology is a subject of high relevance.
- General Studies Section:
- Questions from biology are common in general science, especially in prelims.
- Topics like human physiology, diseases, nutrition, environment, and ecology are frequently asked.
- Current Affairs Link: Biology is connected with health issues (like COVID-19, vaccines), environment, and biotechnology developments.
- Scoring Nature: Questions are often factual and straightforward, making biology one of the easier science subjects to score in.
- Relevance in Interviews and Essays:
- Knowledge of biology helps in writing essays on environment, health, or science & technology.
- In interviews, awareness of biological issues shows scientific temperament and analytical skills.
- Foundation for Specialized Exams: Exams for medical officers, forest services, food inspectors, and teachers have biology as a core subject.
Conclusion
Biology is the science of life, providing insights into the mysteries of living beings and guiding humanity toward progress. Its branches cover everything from cells to ecosystems, from heredity to evolution. For humanity, biology ensures better health, sustainable agriculture, technological innovations, and environmental balance.
For government job aspirants, biology is equally vital as it forms a significant portion of competitive exams, offering both direct questions and applied knowledge useful in essays, interviews, and administrative responsibilities. In short, biology is not just about studying plants, animals, and humans—it is about understanding life itself and using that knowledge to build a healthier, sustainable, and progressive society.