Activities
Biomes IB-style Qns - model answers (2025)
The file below shows model answers for the IB style questions: Biomes IB-style questions which are found on the page Terrestrial Biomes (2025) Please remember that these are 'model answers' and many...
Activities
Climographs activity - model answers (2025)
The file below shows model answers for the IB style questions: Biomes IB-style questions which are found on the page Terrestrial Biomes (2025) Please remember that these are 'model answers' and many...
eBook
B3.3 Muscles & motility - student friendly summary
This is a 'student friendly' summary list of the IB DP Biology Guide for Topic B3.3 Muscles & motility Form & function — Organisms AHL: 3 hours Guiding questions Proteins within sarcomeres in muscles...
Activities
The skeleton & joints - model answers
These are suggested model answers for the activity Synovial joint worksheet As model answers they don't cover all the possible options for correct responses, but they provide a very good guide for students...
Activities
The skeleton & joints (2025)
This series of activities explores the role of the skeleton as levers and for anchorage of muscles. The differences between endoskeleton and exoskeletons are discussed, followed by the movement and structure...
Activities
HL examples of adaptations - model answers
The document below shows some suggestions for answers to the activity questions HL Cell shape specializations - IB style questions on the page HL Examples of adaptations Of course there are other possible...
Activities
HL Examples of adaptations
This activity looks specifically at adaptations for the increase of surface area of cells. These include flattening, microvilli and invaginations using cells of the alveoli, blood and the kidney nephron...
Activities
Contraction & relaxation of muscles - model answers
These are suggested model answers for the activity Sliding filament model of muscle contraction worksheet As model answers they don't cover all the possible options for correct responses, but they provide...
Activities
Contraction & relaxation of muscles (2025)
This series of lessons looks at the structure of a motor unit in skeletal muscles. It then explores the sliding filament model of muscle contraction to explain how a sarcomere contracts using actin and...
Activities
Cell size as a specialization (2025)
In these activities students consider the range of cell size in humans including a few examples of cells, male and female gametes, red and white blood cells, neurones and striated muscle fibres. There...