12th Class Biology Notes PDF (2nd Year) PTB | Updated 2026

Download Class 12 Biology Notes 2026 PDF for Punjab Board. Get solved exercises, chapter-wise notes, MCQs, short questions, and Urdu & English medium guides.

12th Class Biology Full Notes PDF

Quick Information

Everything you need to know
about 12th class Biology notes.

Class 12th / HSSC Part 2
Subject Biology
Board Punjab Boards
Session 2026
Medium English & Urdu
Chapters 13
Notes Format PDF / Online
Syllabus Punjab Biology Curriculum

12th Class Biology Notes Chapter Wise

13 Chapters
15

Homeostasis

Homeostasis, osmoregulation and maintenance of internal balance

▣ Notes (Obj) ▣ Notes (Sub)
16

Support and Movements

Support systems, skeleton and movement in organisms

▣ Notes (Obj) ▣ Notes (Sub)
17

Coordination and Control

Nervous system, hormones, coordination and control

▣ Notes (Obj) ▣ Notes (Sub)
18

Reproduction

Reproductive systems, processes and reproduction in organisms

▣ Notes (Obj) ▣ Notes (Sub)
19

Growth and Development

Growth, development, hormones and biological changes

▣ Notes (Obj) ▣ Notes (Sub)
20

Chromosomes and DNA

Chromosomes, DNA structure, genes and genetic information

▣ Notes (Obj) ▣ Notes (Sub)
21

Cell Cycle

Cell cycle, mitosis, meiosis and cell division

▣ Notes (Obj) ▣ Notes (Sub)
22

Variation and Genetics

Genetic variation, inheritance, genes and heredity

▣ Notes (Obj) ▣ Notes (Sub)
23

Biotechnology

Biotechnology, genetic engineering and biological applications

▣ Notes (Obj) ▣ Notes (Sub)
24

Evolution

Evolution, natural selection and biological diversity

▣ Notes (Obj) ▣ Notes (Sub)
25

Ecosystem

Ecosystems, energy flow, food chains and ecological relationships

▣ Notes (Obj) ▣ Notes (Sub)
26

Some Major Ecosystems

Major ecosystems, their features and ecological importance

▣ Notes (Obj) ▣ Notes (Sub)
27

Man and His Environment

Human activities, environment, pollution and conservation

▣ Notes (Obj) ▣ Notes (Sub)

What Are Included in 12th Class Biology Notes?

These notes cover important Biology topics and exam-oriented resources to help students prepare for HSSC Part 2 exams.

Chapter Wise Notes
Objective Questions
Subjective Questions
Short Questions
Long Questions
Important Definitions
Biological Concepts
Exam Preparation Material

Frequently Asked Questions

You can download chapter-wise 12th Class Biology notes PDF from this page. Open any chapter and use the available Notes (EN) or Notes (Urdu) link.
Yes, these 12th Class Biology notes are arranged according to the Punjab Boards Biology syllabus for HSSC Part 2.
Yes, the available chapter-wise Biology material includes subjective notes that can be accessed through the Notes (Urdu) option where provided.
Yes, chapter-wise objective Biology notes are available through the Notes (EN) option for Chapters 15 to 27 where PDF links are provided.
This page includes 13 chapters, starting from Chapter 15 Homeostasis and ending with Chapter 27 Man and His Environment.

12th Class Notes – Other Subjects

Physics Biology Chemistry Computer Science Math Pak Studies English Urdu English Grammar Economics Civics

More on 12th class


Join WhatsApp Group