In this module you will cover:

• Cell structure: Life on Earth exists in the form of cells, all of which share fundamental features. Variations between cells arise from additional structures, providing indirect evidence for evolution.
• Cell division: Cells originate from pre-existing cells- prokaryotic cells divide by binary fission, while eukaryotic cells reproduce through mitosis and meiosis.
• Transport across cell membranes: All cells have a cell-surface membrane, while eukaryotic cells also contain internal membranes. These membranes share a common structure and regulate substance exchange through passive or active transport. Cell-surface membranes contain embedded proteins with key roles in communication and immunity.
  
• Cell recognition and the immune system: Some cell membrane proteins facilitate cell signalling, while others act as antigens, distinguishing between ‘self’ and ‘foreign’ cells. These cellular interactions play a crucial role in disease, recovery, and long-term immunity upon re-exposure to the same antigen or pathogen.