Chapter 1 The Science of Biology Notes - Class 9 Biology Punjab Board

Chapter-wise notes for Class 9 Biology Chapter 1, The Science of Biology, prepared for Punjab Board students, with solved exercises, MCQs and important questions available to read online.

This page provides Class 9 Biology Chapter 1, The Science of Biology, notes for Punjab Board students following the PCTB syllabus for the 2026-2027 session. It includes solved exercises, important MCQs, and short and long questions, and can be read online chapter by chapter by SSC Part 1 and Matric Part 1 students.
Next
Chapter 2
Advertisement

Chapter Overview

Chapter 1 of Class 9 Biology, The Science of Biology, introduces students to biology as a scientific field and explains how it connects with other branches of science. The chapter covers the major branches of biology, the range of careers available in biological sciences, and how biological knowledge relates to subjects like chemistry, physics and Islamic teachings on studying life.

A significant part of this chapter focuses on the scientific method, including how a hypothesis is formed, tested and either supported or rejected, and the difference between a scientific theory and a law or principle. The chapter uses malaria as a practical example to show how the scientific method is applied step by step in real biological research.

This chapter matters for Punjab Board exams because it builds the conceptual foundation used throughout the rest of the Class 9 Biology course, and Punjab Board papers often include short questions on the scientific method and the branches of biology from this chapter. These solved notes are organized to help students understand each concept clearly and prepare efficiently for their exams.

FAQs

Are these Chapter 1 The Science of Biology notes according to Punjab Board syllabus?
Yes, these notes are prepared according to the Punjab Board syllabus for Chapter 1, The Science of Biology, following the PCTB curriculum for the 2026-2027 session.
Do these notes include solved exercises?
Yes, all exercise questions from Chapter 1 are solved in a clear format, covering definitions, short answers and concept-based explanations from the chapter.
Are MCQs included in these chapter notes?
Yes, solved multiple choice questions based on the branches of biology, the scientific method and related concepts from Chapter 1 are included in these notes.
Can students read these chapter notes online?
Yes, Chapter 1 notes can be read online directly on this page, along with a PDF preview for quick reference before revision.
Are these notes useful for Punjab Board exams?
Yes, the notes are structured around common Punjab Board question patterns for this chapter, including short questions on the scientific method and branches of biology.
Who should use these chapter notes?
These notes are meant for Class 9 students studying under Punjab Board, including SSC Part 1 and Matric Part 1 students preparing for tests or annual exams.
Are these notes based on the latest PCTB / PECTAA syllabus?
Yes, the notes follow the current PCTB and PECTAA syllabus structure for Class 9 Biology as applicable for the 2026-2027 session.
Are these chapter notes free for students?
Yes, Chapter 1 notes are provided free of cost for educational reference and Punjab Board exam preparation.