The Australian Stem Cell Centre (ASCC), developed the following fact sheets in respect of stem cell science and related topics. Please note that whilst the Fact Sheets were updated shortly before the ASCC closed in 2011, users should note that they are no longer being updated and be aware that the content in them may be out of date. Although the content of the fact sheets is unlikely to have been superseded please do not rely on them for any decision-making purposes and they should be used as part of a wider reading program on the subjects.
This directed case study in PowerPoint format focusses on the London Underground Mosquito, Culex molestus, and its potential relationship to the common mosquito, Culex pipiens, in order to explore the topics of evolution, reproductive isolation, and speciation. As the story unfolds, the case mirrors the process of science. The students receive some initial data and observations collected by Byrne and Nichols in London. Based on these observations, the students then form a hypothesis and design an experiment. Finally, they receive more data collected by Becker et al. and draw conclusions.
Movement of ions in and out of cells is crucial to maintaining homeostasis within the body and ensuring that biological functions run properly. The natural movement of molecules due to collisions is called diffusion. Several factors affect diffusion rate: concentration, surface area, and molecular pumps. This activity demonstrates diffusion, osmosis, and active transport through 12 interactive models. Start by following the path of a molecule of dye in water, create concentration gradients on either side of a cell membrane and watch the movement of substances in and out of a cell, and monitor the movement of oxygen into red blood cells with and without hemoglobin.
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