A3. Organisms | IB Biology

THEME A

A3. Organisms

Unity and Diversity

Explore the incredible diversity of life on Earth and the systems used to classify and understand evolutionary relationships between organisms.

🌿 A3.1 Diversity of Organisms

Study the incredible variety of life forms and their adaptations to different environments.

STANDARD LEVEL

Presentation Slides End of Topic Quiz

HIGHER LEVEL

Presentation Slides End of Topic Quiz

STANDARD + HIGHER LEVEL

Workbook (Both Levels)

SL+HL

🔬 A3.2 Classification and Cladistics

Examine how organisms are classified and how evolutionary relationships are determined through cladistic analysis.

HIGHER LEVEL

Presentation Slides End of Topic Quiz Workbook

🌿

A3.1 Diversity of Organisms

SLIDES

A3.1 Diversity of Organisms (SL) – Presentation Slides

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View Slides 1

QUIZ

A3.1 Diversity of Organisms (SL) – End of Topic Quiz (20 marks)

📝 Complete the quiz above and submit your answers

Take Quiz 2

SLIDES

A3.1 Diversity of Organisms (HL) – Presentation Slides

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View Slides 3

QUIZ

A3.1 Diversity of Organisms (HL) – End of Topic Quiz (20 marks)

📝 Complete the quiz above and submit your answers

Take Quiz 4

📚

Shared Materials (Standard + Higher Level)

DOC

A3.1 Diversity of Organisms – Workbook (STANDARD + HIGHER LEVEL)

SL+HL

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

View Workbook 5

🔬

A3.2 Classification and Cladistics

SLIDES

A3.2 Classification and Cladistics (HL) – Presentation Slides

💡 Use arrow keys or click to navigate slides

View Slides 6

QUIZ

A3.2 Classification and Cladistics (HL) – End of Topic Quiz (20 marks)

📝 Complete the quiz above and submit your answers

Take Quiz 7

DOC

A3.2 Classification and Cladistics (HL) – Workbook

📖 Questions and answers workbook for Higher Level students

View Workbook 8