IB Biology A2.2 Definitions

This page contains our IB Biology definitions for A2.2. By learning each one of these definitions, you will fully cover the content for IB Biology 'Further cell structure'.

All Topic 2 Sub-topics (HL)A2.1: Origins of cells A2.2: Cell Structure (HL)A2.2: Further cell structure (HL)A2.3: Viruses B2.1: Membranes And Transport (HL)B2.1: Further membranes and transport B2.2: Organelles & Compartmentalisation (HL)B2.2: Further organelles B2.3: Cell Specialisation (HL)B2.3: Further cell specialisation (HL)C2.1: Chemical signalling C2.2: Neural Signalling (HL)C2.2: Further neural signalling D2.1: Cell Division (HL)D2.1: Cell cycle (HL)D2.2: Gene expression D2.3: Water Potential (HL)D2.3: Further water potential

endosymbiosis

The absorbance of a smaller cell by a larger cell with a vesicle so that the smaller cell now performs functions for the larger cell

symbyosis

The living together of two organisms

Next Up

You have completed the topic 2 definitions for IB Biology - continue with related resources below or explore the full IB Biology course from the IBO.

Explored IB Biology Definitions?

Get stuck into one of our other subjects!

Other subjects' Definitions

Chemistry

Physics

Join 85,000 students, across 130+ countries, in 500+ IB schools. That's half of the IB science graduates worldwide.

Start a 7d free trial