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. NCERTsolutions 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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