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Class 9 Biology Chapter 1 Long Questions Notes PDF


In this post, I am sharing the Class 9 Biology Chapter 1 Long Questions Notes PDF for the students of the 9th class. Introduction to Biology is the 1st chapter in the 9th Class Physics biology book. Biology is a science subject and could be a little hard for some students. However, students who are willing to choose the medical field as a profession feel this subject is interesting. Students can download 9th Class Biology Chapter 1 long questions with answers Notes PDF on their laptop or mobile to read offline from ilmihub.

These 9th class biology notes are for all the boards working under the Punjab Board like Gujranwala Board, Lahore Board, Faisalabad Board, Multan Board, Rawalpindi Board, Sargodha Board, DG Khan Board, and Sahiwal Board. To download chapter 1 Introduction to Biology notes, click here.

Class 9 Biology Chapter 1 “Introduction to Biology” Long Questions with Answers

File Size: 2.77MB
Pages: 13
Chapter Name: Introduction to Biology
Notes: Long Questions with Answers

9th Class Biology Long Questions Chapter 1

What is Science?

Science is when we use our curiosity to learn about the world around us. We ask questions, do experiments, and discover how things work, like why the sky is blue or how plants grow.

What Dr. Abdul Salam say about scientific knowledge?

According to Dr. Abdul Salam, scientific knowledge is the common heritage of mankind.

What is biology? Describe major divisions of biology.

Definition: “The scientific study of life is called biology”.
The term “biology” comes from combining two Greek words:
(a) “Bios” means ‘life’
(b) “logos” means ‘thought or reasoning’

What do we study in biology?

In biology, we study living things and how they work, This includes animals, plants, and even tiny organisms like bacteria.

What is the relationship of biology to other sciences?

Biology is like a big puzzle piece that fits with other subjects. It’s connected to chemistry because chemicals make up living things, and to physics because bodies and movements are part of living things. Biology also links with Earth science when we study animals and plants in their habitats. So, all these subjects help us understand how the world works together.


Bio-physics is about using physics rules to understand living things. For example, we can see similarities between how levers work in physics and how animals’ limbs move in biology. It helps us connect the two subjects and learn more about how nature works.


Biochemistry is all about studying the chemicals and processes in living things. For instance, when we look at how plants make food and how animals breathe, we’re using chemistry to understand how they work. It’s like finding out the secrets of life through chemicals!

Related Links:

  1. Class 9 Biology Chapter 1 Short Questions Notes PDF
  2. Class 9 Biology Chapter 1 Solved MCQs Notes PDF
  3. 9th Class All Subjects Books PDF Download
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