B3.1 - Gas Exchange

B3.2 - Transport

Topic B3.2, transport, takes a look at the different circulatory systems and transport processes in animals and plants.

B3.1 - Gas Exchange

This episode looks into topic B3.1, gas exchange to understand the adaptations of gas exchange surfaces and the different processes surrounding gas exchange in animals and plants.

D2.3 - Water Potential

This episode takes a quick look at topic D2.3, water potential. We look into osmosis and its effects on cells as well as water potential and how it impacts the movement of water across a selectively permeable membrane.

D2.2 - Gene Expression (HL)

Topic D2.2, gene expression, is an only HL topic that looks into epigenetics and gene expression as a whole. We take a look at different mechanism and examples to understand the relevance of gene expression and the impact of environmental factors on it.

D2.1 - Cell and Nuclear Division

This episode looks at topic D2.1, cell and nuclear division. We discuss the differences between mitosis and meiosis as well as the phases of the two different cell division types and their importance.