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C3

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C3. Organisms | IB Biology
THEME C

C3. Organisms

Interaction and Interdependence
Discover how organisms integrate complex body systems and defend against disease through coordinated physiological responses.
🔗

C3.1 Integration of Body Systems

SLIDES

C3.1 Integration of Body Systems (SL) – Student Slide Set

SL

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View Slides 1
QUIZ

C3.1 Integration of Body Systems (SL) – End of Topic Quiz (20 marks)

SL

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Take Quiz 2
SLIDES

C3.1 Integration of Body Systems (HL) – Student Slide Set

HL

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View Slides 3
QUIZ

C3.1 Integration of Body Systems (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 4
📚

Shared Materials (Standard + Higher Level)

DOC

C3.1 Integration of Body Systems – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

📖 Questions and answers workbook for both Standard and Higher Level students

View Workbook 5
🛡️

C3.2 Defense Against Disease

SLIDES

C3.2 Defense Against Disease (SL) – Student Slide Set

SL

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View Slides 6
QUIZ

C3.2 Defense Against Disease (SL) – End of Topic Quiz (20 marks)

SL

📝 Complete the quiz above and submit your answers

Take Quiz 7
DOC

C3.2 Defense Against Disease – Workbook (STANDARD LEVEL)

SL

📖 Questions and answers workbook for Standard Level students

View Workbook 8

C2

by
C2. Cells | IB Biology
THEME C

C2. Cells

Interaction and Interdependence
Explore how cells communicate through chemical and neural signalling mechanisms that coordinate complex biological processes.
📡

C2.1 Chemical Signalling

SLIDES

C2.1 Chemical Signalling (HL) – Student Slide Set

HL

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View Slides 1
QUIZ

C2.1 Chemical Signalling (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 2
DOC

C2.1 Chemical Signalling – Workbook (HIGHER LEVEL)

HL

📖 Questions and answers workbook for Higher Level students

View Workbook 3
⚡

C2.2 Neural Signalling

SLIDES

C2.2 Neural Signalling (SL) – Student Slide Set

SL

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View Slides 4
QUIZ

C2.2 Neural Signalling (SL) – End of Topic Quiz (20 marks)

SL

📝 Complete the quiz above and submit your answers

Take Quiz 5
SLIDES

C2.2 Neural Signalling (HL) – Student Slide Set

HL

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View Slides 6
QUIZ

C2.2 Neural Signalling (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 7
📚

Shared Materials (Standard + Higher Level)

DOC

C2.2 Neural Signalling – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

📖 Questions and answers workbook for both Standard and Higher Level students

View Workbook 8

C1

by
C1. Molecules | IB Biology
THEME C

C1. Molecules

Interaction and Interdependence
Explore how organisms interact with each other and their environment through metabolic processes, signaling systems, immune responses, and ecological relationships.
⚡

C1.1 Enzymes and Metabolism

SLIDES

C1.1 Enzymes and Metabolism (SL) – Student Slide Set

SL

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View Slides 1
QUIZ

C1.1 Enzymes and Metabolism (SL) – End of Topic Quiz (20 marks)

SL

📝 Complete the quiz above and submit your answers

Take Quiz 2
SLIDES

C1.1 Enzymes and Metabolism (HL) – Student Slide Set

HL

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View Slides 3
QUIZ

C1.1 Enzymes and Metabolism (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 4
📚

Shared Materials (Standard + Higher Level)

DOC

C1.1 Enzymes and Metabolism – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

📖 Questions and answers workbook for both Standard and Higher Level students

View Workbook 5
🫁

C1.2 Cell Respiration

SLIDES

C1.2 Cell Respiration (SL) – Student Slide Set

SL

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View Slides 6
QUIZ

C1.2 Cell Respiration (SL) – End of Topic Quiz (20 marks)

SL

📝 Complete the quiz above and submit your answers

Take Quiz 7
SLIDES

C1.2 Cell Respiration (HL) – Student Slide Set

HL

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View Slides 8
QUIZ

C1.2 Cell Respiration (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 9
📚

Shared Materials (Standard + Higher Level)

DOC

C1.2 Cell Respiration – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

📖 Questions and answers workbook for both Standard and Higher Level students

View Workbook 10
🌱

C1.3 Photosynthesis

SLIDES

C1.3 Photosynthesis (SL) – Student Slide Set

SL

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View Slides 11
QUIZ

C1.3 Photosynthesis (SL) – End of Topic Quiz (20 marks)

SL

📝 Complete the quiz above and submit your answers

Take Quiz 12
SLIDES

C1.3 Photosynthesis (HL) – Student Slide Set

HL

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View Slides 13
QUIZ

C1.3 Photosynthesis (HL) – End of Topic Quiz (20 marks)

HL

📝 Complete the quiz above and submit your answers

Take Quiz 14
📚

Shared Materials (Standard + Higher Level)

DOC

C1.3 Photosynthesis – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

📖 Questions and answers workbook for both Standard and Higher Level students

View Workbook 15

Interaction & Interdependence

by
Interaction & Interdependence | Biology SL 2025
BIOLOGY SL 2025

Interaction & Interdependence

Systems and Connections
Explore how biological systems interact and depend on each other – from cellular metabolism to ecosystem dynamics and organism integration.

🔗 Choose Your Topic

Select a topic below to access comprehensive study materials

⚡

Cellular Processes & Metabolism

Study energy transformations, enzyme function, photosynthesis, and cellular respiration in biological systems.

Enzymes & Metabolism Photosynthesis Cell Respiration
PDF
Enzymes & Metabolism
PDF
Photosynthesis
PDF
Cell Respiration
🧠

Body Systems Integration

Understand how different body systems work together through neural signaling, integration, and defense mechanisms.

Neural Signalling Body System Integration Disease Defence
PDF
Neural Signalling
PDF
Integration of Body Systems
PDF
Defence Against Disease
🌿

Ecological Systems

Explore interactions within ecosystems, including energy and matter transfer and population dynamics.

Energy & Matter Transfer Populations & Communities
PDF
Transfer of Energy & Matter
PDF
Populations & Communities

📊 Biology SL 2025 Overview

Complete collection of Interaction & Interdependence materials for Standard Level

8
PDF Resources
3
Topic Categories
SL
Standard Level
2025
Curriculum

💡 Key Concepts

Understanding how biological systems interact and depend on each other

🔗

System Integration

How different biological systems work together to maintain life

⚡

Energy Flow

Transfer and transformation of energy through biological processes

🌊

Chemical Communication

How organisms use chemical signals for coordination and response

🌍

Ecosystem Dynamics

Interactions between organisms and their environment in communities

Form & Function

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Form & Function | Biology SL 2025
BIOLOGY SL 2025

Form & Function

Structure and Process
Explore how biological structures are perfectly adapted to their functions – from molecular transport to cellular specialization and environmental adaptation.

🔬 Choose Your Topic

Select a topic below to access comprehensive study materials

🧬

Molecular & Cellular Structure

Study the fundamental building blocks of life – proteins, carbohydrates, lipids, and cellular organization.

Proteins Carbohydrates & Lipids Organelles Cell Specialisation
PDF
Proteins
PDF
Carbohydrates & Lipids
PDF
Organelles & Compartmentalisation
PDF
Cell Specialisation
🚀

Transport & Movement

Understand how substances move through biological systems and how gases are exchanged across membranes.

Transport Systems Membrane Transport Gas Exchange
PDF
Transport
PDF
Membranes & Membrane Transport
PDF
Gas Exchange
🌍

Environmental Interactions

Explore how organisms adapt to their environments and find their ecological niches.

Environmental Adaptation Ecological Niches
PDF
Adaptation to Environment
PDF
Ecological Niches

📊 Biology SL 2025 Overview

Complete collection of Form & Function materials for Standard Level

9
PDF Resources
3
Topic Categories
SL
Standard Level
2025
Curriculum

💡 Key Concepts

Understanding how structure relates to function in biological systems

🔗

Structure-Function Relationship

Every biological structure is perfectly adapted to perform its specific function

⚖️

Surface Area to Volume

Size and shape optimizations for efficient transport and exchange

🌊

Transport Mechanisms

Passive and active processes that move substances across membranes

🎯

Specialization

How cells and organisms become specialized for specific roles

Continuity & Change

by
Continuity & Change | Biology SL 2025
BIOLOGY SL 2025

Continuity & Change

Evolution and Genetics
Explore how life maintains continuity through reproduction and inheritance while adapting through evolution and natural selection.

🧬 Choose Your Topic

Select a topic below to access comprehensive study materials

🧬

Genetic Information & Processes

Study DNA replication, protein synthesis, and cellular division processes in biological systems.

DNA Replication Protein Synthesis Cell & Nuclear Division
PDF
DNA Replication
PDF
Protein Synthesis
PDF
Cell & Nuclear Division
👨‍👩‍👧‍👦

Inheritance & Reproduction

Understand how traits are passed from generation to generation through reproduction and inheritance patterns.

Reproduction Inheritance
PDF
Reproduction
PDF
Inheritance
🌿

Evolution & Environmental Change

Explore how species evolve through natural selection and adapt to environmental challenges like climate change.

Natural Selection Climate Change
PDF
Natural Selection
PDF
Climate Change
⚖️

Stability & Regulation

Study how organisms maintain internal balance and stability while adapting to changing conditions.

Homeostasis Water Potential Stability & Change
PDF
Homeostasis
PDF
Water Potential
PDF
Stability & Change

📊 Biology SL 2025 Overview

Complete collection of Continuity & Change materials for Standard Level

10
PDF Resources
4
Topic Categories
SL
Standard Level
2025
Curriculum

💡 Key Concepts

Understanding how life maintains continuity while adapting to change

🔄

Genetic Continuity

How genetic information is faithfully replicated and passed to offspring

🧬

DNA & Protein Synthesis

The central dogma of molecular biology from DNA to proteins

🌱

Evolution by Natural Selection

How populations change over time through differential survival and reproduction

⚖️

Dynamic Equilibrium

How organisms maintain stability while adapting to environmental changes

Test Forms

by
B1. Molecules | Biology
B1

Molecules

Form and Function
Carbohydrates, Lipids and Proteins

🧪 Course Materials

🍬

B1.1 Carbohydrates and lipids

Standard Level Presentation
SL
End of Topic Quiz
SL
Workbook
SL
🧬

B1.2 Proteins

Standard Level Presentation
SL
End of Topic Quiz
SL
Higher Level Presentation
HL
End of Topic Quiz
HL
Workbook
SL+HL
🍬

B1.1 Carbohydrates and lipids

Standard Level Presentation

SL

💡 Use arrow keys or click to navigate slides

View Slides 1

Standard Level Quiz – 20 marks

SL

📝 Complete the quiz above and submit your answers

Take Quiz 2

Workbook – Questions and Answers

SL
Open in New Tab 3
🧬

B1.2 Proteins

Standard Level Presentation

SL

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View Slides 4

Standard Level Quiz – 20 marks

SL

📝 Complete the quiz above and submit your answers

Take Quiz 5

Higher Level Presentation

HL

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View Slides 6

Higher Level Quiz – 20 marks

HL

📝 Complete the quiz above and submit your answers

Take Quiz 7

Workbook – Questions and Answers

SL+HL
Open in New Tab 8

A2.3 Viruses (HL) – 20 marks

HL

📝 Complete the quiz above and submit your answers

Take Quiz 9

Small test

by
A2. Cells | IB Biology
THEME A

A2. Cells

The Building Blocks of Life
Explore the fundamental units of life – from the origins of cellular life to complex cellular structures and the unique characteristics of viruses.

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