1.4 – Symbiotic bioluminescence – by HHMI (n.d.)
1.5.1 – Interactive Eukaryotic Cell Model – by CELLS alive! (n.d.)
1.5.2 – Eukaryopolis: The City of Animal Cells – by CrashCourse Biology (2012)
1.6 – The Evolution of the Cell – by Genetic Science Learning Center (2010)
2.1 – Microscopes and How to Use a Light Microscope – by Amoeba Sisters (2019)
3.1 – Cell membranes and cell transport: molecules like to move it, move it – by Amoeba Sisters (2016)
3.3 – Fluid mosaic model: cell membranes article – by Khan Academy (n.d.)
3.4 – In Da Club - Membranes and transport. (Episode 5) – by CrashCourse (2012)
3.9 – The Sodium-Potassium Pump – by RicochetScience (2016)
4.6 – Why are there bacteria in my yoghurt? – by SciShow (2016)
6.2 – Enzymes – by Amoeba Sisters (2016)