📘 Important Diagrams Chapter-wise
(Class 12 Biology)
Your
complete visual guide for quick revision ✨
Welcome
to the Important Diagrams Hub of Smart Bio Notes!
This page brings together all essential NCERT biology diagrams, arranged
chapter-wise, so you can revise faster and score better in board exams
and NEET.
Diagrams
play a huge role in Biology — they help you understand concepts, remember
structures, and earn full marks in exams. So I’ve collected every
important diagram from each chapter in a simple and easy-to-read format.
🌿 Unit VI: Reproduction
Chapter 1: Sexual Reproduction in
Flowering Plants
📌
Important Diagrams:
- L.S. of a Flower
- Structure of a Pollen Grain
- Male Gametophyte
- Embryo Sac (Female Gametophyte)
- Double Fertilization
- Development of Embryo
- Structure of a Mature Seed
Chapter 2: Human Reproduction
📌
Important Diagrams:
- Male Reproductive System
- Female Reproductive System
- Graafian Follicle
- Ovum Structure
- Spermatogenesis
- Oogenesis
- Menstrual Cycle Chart
Chapter 3: Reproductive Health
📌
Important Diagrams:
- Various Contraceptive Methods
- IUD Types
- MTP & Infertility Treatment
Flowcharts
- ART Techniques (IVF, ZIFT,
GIFT)
🧬 Unit VII: Genetics &
Evolution
Chapter 4: Principles of Inheritance
and Variation
📌
Important Diagrams:
- Mendel’s Monohybrid &
Dihybrid Cross
- Punnett Square
- Law of Independent Assortment
Chart
- Pedigree Analysis Symbols
Chapter 5: Molecular Basis of
Inheritance
📌
Important Diagrams:
- Structure of DNA
- Structure of RNA
- Replication Fork
- Transcription Unit
- Translation (Protein Synthesis
Diagram)
- Lac Operon Diagram
🌍 Unit VIII: Biology in
Human Welfare
Chapter 6: Evolution
📌
Important Diagrams:
- Darwin’s Finches
- Industrial Melanism
- Hardy-Weinberg Curve
Chapter 7: Human Health &
Disease
📌
Important Diagrams:
- Immune System – Types of
Immunity
- Antibody Structure
- Life Cycle: Plasmodium
- AIDS – HIV Structure
Chapter 8: Microbes in Human Welfare
📌
Important Diagrams:
- Sewage Treatment Process
- Biogas Plant Diagram
- Fermenter Structure
🌱 Unit IX: Biotechnology
Chapter 9: Biotechnology – Principles
& Processes
📌
Important Diagrams:
- Recombinant DNA Process
- Plasmid pBR322
- Gel Electrophoresis
- Bioreactor Diagram
Chapter 10: Biotechnology & Its
Applications
📌
Important Diagrams:
- Bt Cotton Mechanism
- RNA Interference
- Gene Therapy Diagram
🌳 Unit X: Ecology
Chapter 11: Organisms &
Populations
📌
Important Diagrams:
- Population Growth Curves
- Age Pyramids
- Adaptations (Desert / Polar /
Aquatic)
Chapter 12: Ecosystem
📌
Important Diagrams:
- Food Chain
- Food Web
- Pyramids of Number, Biomass
& Energy
- Carbon Cycle / Nitrogen Cycle
Chapter 13: Biodiversity &
Conservation
📌
Important Diagrams:
- Species–Area Curve
- Levels of Biodiversity
- Extinction Graphs
Chapter 14: Environmental Issues
📌
Important Diagrams:
- Greenhouse Effect
- Ozone Depletion
- Water & Air Pollution Chart
Stay connected and keep learning — you’re doing amazing! 🌼
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