Molecules to Ecosystems | An IB Bio Podcast

Maria Grau
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  • Naturwissenschaften

to study for my IB exams i made a podcast covering the 2025 IB bio course! dm me for any questions and feedback @mariaagraau :) i hope you enjoy!

  1. 08.05.2025

    B3.2 - Transport

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

    25 Min.

  2. 08.05.2025

    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.

    20 Min.

  3. 07.05.2025

    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.

    9 Min.

  4. 04.05.2025

    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.

    11 Min.

  5. 03.05.2025

    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.

    29 Min.

  6. 25.04.2025

    C2.2 - Neural Signalling

    Topic C2.2, neural signalling, looks at the structure and function of neurons and at the process of neural signalling. We take a look at different examples, such as acetylcholine and cocaine, to understand how membrane potentials change to transmit nerve impulses.

    20 Min.

  7. 24.04.2025

    C2.1 - Chemical Signalling

    In this episode we take a look at topic C2.1 which is chemical signalling. This is only in the HL syllabus and looks at ligands as signalling molecules and receptors are proteins that they bind to. We take a look at different example of ligands and receptors that initiate a variety of different signalling pathways.

    28 Min.

  8. 18.04.2025

    B2.3 - Cell Specialisation

    This episode looks into topic B2.3, cell specialisation. We take a look at the stem cells and their potency and then at the many adaptations of different cells to perform their specific functions.

    20 Min.
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to study for my IB exams i made a podcast covering the 2025 IB bio course! dm me for any questions and feedback @mariaagraau :) i hope you enjoy!

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