Biology (Gk. Bios-life and logos-to speech) is the branch of science that deals with the scientific study of life. It depends on other sciences (such as physics and chemistry) and has therefore become a multidisciplinary and multidimensional scientific branch. Biology is better known as “life sciences” because it seeks to understand how living things interact with other “living” and “non-living” things.
Precisely, biology is research, an ongoing investigation into the nature of life. Biology, being an important branch of science, requires a scientific approach to understand and obtain precise results.
• The term “biology” was coined by Lamarck and Treviranus in 1802.
• Aristotle is known as “father of biology and zoology”.
• Theophrastus is known as the “father of botany”.
• Microorganisms were first observed by A.V. Leeuwenhoek but Louis Pasteur is considered to be the father of microbiology.
• Emil von Behring (Germany) was the first Nobel Prize in physiology and medicine to receive this prize in 1901 for serum therapy against “diphtheria”
Chapters cover in class 9 Biology
Chapter 1 - The fundamental unit of life
This chapter will help you discover the cell as the basic unit of life. Biology experts will give you step-by-step answers to explain concepts like eukaryotic cells, prokaryotic cells, chloroplast, Golgi apparatus, chromosomes, nuclei, etc.
Chapter 2 - Fabrics
Get answers on plant and animal tissue Chapter 2, Tissue. Discover the permanent and meristematic fabrics. Understand the structure of tissues and write precise answers to questions related to this concept.
Chapter 3 - Diversity of living organisms
This chapter explores concepts of biological diversity, such as groups of plants and groups of animals. Find NCERT expert solutions with explanations on angiosperms, bacteria, bryophytes, chordates, non-chordates and more.
Chapter 4 - Why are we sick?
Find out what it means to be healthy and unhealthy. Get complete answers about the causes of the disease and how you can lead a healthy life. In this chapter, learn about diseases, causes of diseases and infectious diseases.
Chapter 5 - Natural Resources
Understand the importance of resources such as air, water and soil. Write answers about geochemical cycles in nature. This chapter also deals with types of pollution and methods of pollution control to avoid possible damage.
Chapter 6 - Improving Food Resources
Explore concepts such as animal husbandry, the use of fertilizers, and ways to protect crops from pests. Find answers to questions about crop improvement, crop protection, agricultural production, etc. Also discover the basic concepts and the importance of organic farming in this chapter on biology.
Why Entrancei for CBSE class 9 Biology
The entry academic team is made up of a team of very experienced teachers who have prepared a dedicated academic resource for class 9 biology. Our team understands the resource requirements for class 9 biology and its use. You can get a detailed chapter of class 9 biology notes with the addition of resolved and unresolved examples. Each chapter of class 9 biology notes consists of one to 5 exercises with objective type questions that have improved your learning from the chapters. NCERT solutions for class 9 will help you excel in the exam prepared by our academic team. On the same page, you will get an online quiz for biology class 9. The model of the online questionnaire is similar to that of the body of the exam. In addition to these resources, you can refer to the Important questions for class 9 biology and to the different segments for class 9 biology formulas.
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NCERT solutions for class 9 all subjects consist of detail step by step solution of all questions of NCERT text book prepared by entrancei experts