A2. Cells
🔬 Choose Your Topic
Select a cell biology topic below to access comprehensive study materials
A2.1 Origins of Cells
Study how life began on Earth and how the first cells evolved from simple organic molecules to complex cellular structures.
A2.2 Cell Structure
Examine the intricate organization of prokaryotic and eukaryotic cells, their organelles, and specialized structures.
A2.3 Viruses
Investigate the unique characteristics of viruses, their replication cycles, and their relationship with host cells.
📊 A2. Cells Overview
Complete collection of cell biology materials
A2.1 Origins of Cells
A2.1 Origins of Cells (HL) – 20 marks
A2.2 Cell Structure
A2.2 Cell Structure (SL) – 20 marks
A2.2 Cell Structure (HL) – Biology Assessment
A2.3 Viruses
A2.3 Viruses (HL) – 20 marks
🔬 Cell Types & Organization
Understanding the diversity and complexity of cellular life
Prokaryotic Cells
Eukaryotic Cells
Viruses
🌍 Evolution of Cellular Life
The journey from simple molecules to complex cellular organisms
4.6 Billion Years Ago
Earth Formation
Early Earth with hostile conditions, volcanic activity, and no oxygen atmosphere
4.0 Billion Years Ago
Organic Molecules
Formation of amino acids, nucleotides, and other organic building blocks
3.8 Billion Years Ago
First Prokaryotes
Simple bacterial cells with basic metabolic processes
2.5 Billion Years Ago
Photosynthesis
Cyanobacteria begin producing oxygen, changing Earth’s atmosphere
1.8 Billion Years Ago
First Eukaryotes
Complex cells with nuclei and organelles through endosymbiosis
1.0 Billion Years Ago
Multicellular Life
First multicellular organisms leading to complex life forms