Activities
Control of peristalsis - model answers
These are suggested model answers for the activity The control of peristalsis in the digestive system worksheet on the page Feedback & control of body functions (2025) As model answers they don't cover...
eBook
B3.1 Gas exchange - student friendly summary
This is a student friendly summary list of the IB DP Biology Guide for Topic B3.1 Gas exchange Form and function - Organisms SL and HL: 3 hours AHL: 1 hours Guiding questions Multicellular organs...
Activities
Adaptations of haemoglobin HL (2025)
Haemoglobin is specifically adapted for the transport of oxygen. Here we explore how this molecule binds to oxygen and how high levels of carbon dioxide can cause an increase the oxygen dissociation in...
Activities
Gas exchange in plants (2025)
Plant leaves are highly adapted for gas exchange. This series of activities looks at the structures that enable a leaf to maximise gas exchange. It then focusses on skills such as drawing cross-sections...
Activities
Mammalian lungs (2025)
The mammalian lungs are highly specialised to maximise the speed of gas exchange. This series of activities discusses the adaptations of alveoli that enable this to occur and how the lungs are ventilated....
Activities
Gas exchange surfaces (2025)
This is a short series of activities that introduces the concepts of how surface area-to-volume ratio can influence the need for a gas exchange system. It also addresses the properties of gas exchange...
Activities
Translation of mRNA into Amino Acids (2025)
Crick's "Central Dogma of Biology" is now well documented biological research including ribosomes, tRNA and mRNA. A short animation of mRNA and a ribosome in action is followed by guided research about...
eBook
A2.2 Cell differentiation - written task Free
This structured extension question is in the style of the IB exam questions. It has a particular focus on the concept of cell differentiation and the question begins with a little bit of information about...
eBook
B2.3 Cell specialisation - stem cells student reading
These panels contain information about stem cells. This information could be used for the pairs activity as it covers all the details from the DP Biology guide. 1. Stem cell formation & differentiation...
eBook
A2.2 Cell structure - Written tasks Free
These written tasks are designed to help students to practise using their knowledge and skills. In the topic of Cell structure this includes the estimation of cell size in sunflower petal epidermis, exam...