695 results for your search

Anatomy and Physiology, unit 13, The Digestive System
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in Anatomy and Physiology, unit 13 (Bozeman, MT: Bozeman Science, 2011), 10 mins
Paul Andersen starts with a brief description of feeding methods. He then details all of the major parts within the human digestive system. This tour starts in the mouth, move down the esophagus, through the stomach, small investing, colon and rectum. He explains how all of the major macromolecules are digested an...
in Anatomy and Physiology, unit 13 (Bozeman, MT: Bozeman Science, 2011), 10 mins
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Answering Your Questions on Cybersecurity
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produced by United States. Federal Emergency Management Agency (Privately Published), 10 mins
October 28, 2009 - Secretary Napolitano addressed a live web audience to talk about cybersecurity. She also answered a few questions from viewers.
produced by United States. Federal Emergency Management Agency (Privately Published), 10 mins
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AP Biology, Natural Selection
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in AP Biology (Bozeman, MT: Bozeman Science, 2011), 10 mins
In this video Paul Andersen defines natural selection as differential reproductive success. He then explains how natural selection shapes organisms on our planet through variation and selection. A K-12 teaching progression is also included.
in AP Biology (Bozeman, MT: Bozeman Science, 2011), 10 mins
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AP Biology, Mendelian Genetics
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in AP Biology (Bozeman, MT: Bozeman Science, 2011), 16 mins
Paul Andersen explains simple Mendelian genetics. He begins with a brief introduction of Gregor Mendel and his laws of segregation and independent assortment. He then presents a number of simple genetics problems along with their answers. He also explains how advances in genetic knowledge may lead to ethical and p...
in AP Biology (Bozeman, MT: Bozeman Science, 2011), 16 mins
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AP Biology, The Operon
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in AP Biology (Bozeman Science), 10 mins
In this video Paul Andersen describes the elements of an operon. The promoter allows the RNA polymerase to transcribe the required genes. The operator and repressor regulate the expression of the genes by blocking the RNA polymerase. The genes for a specific task are all located in sequence so that they can all be...
in AP Biology (Bozeman Science), 10 mins
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AP Biology, Epigenetics
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in AP Biology (Bozeman, MT: Bozeman Science, 2013), 9 mins
Paul Andersen explains the concepts of genetics. He starts with a brief discussion of the nature vs. nurture debate and shows how epigenetics blurs this distinction. He explains how differentiation of cell types results from the inactivation of certain genes. He describes the three processes of epigenetics: DNA me...
in AP Biology (Bozeman, MT: Bozeman Science, 2013), 9 mins
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AP Biology, Advanced Genetics
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in AP Biology (Bozeman, MT: Bozeman Science, 2015), 12 mins
Paul Andersen explains important concepts that can not be explained by simple Mendelian genetics. He begins with a discussion of polygenic inheritance and uses a simulation on height to show how a bell shape curve of phenotypes is produced. He then discusses the importance of linked genes and those that are found...
in AP Biology (Bozeman, MT: Bozeman Science, 2015), 12 mins
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AP Biology, Episode 54, Population Variation
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in AP Biology, Episode 54 (Bozeman, MT: Bozeman Science, 2011), 10 mins
Paul Andersen explains the importance of genetic variation within a population. He begins with a discussion of the devil facial tumor that is a form of cancer transferred between Tasmanian devils. He then explains how a decrease in genetic variability nearly led to the extinction of the black-footed ferret. He fin...
in AP Biology, Episode 54 (Bozeman, MT: Bozeman Science, 2011), 10 mins
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AP Chemistry, Elements and Molecules
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in AP Chemistry (Bozeman, MT: Bozeman Science, 2013), 6 mins
In this video Paul Andersen explains how elements and molecules are made of atoms. In a pure sample of a pure substance the average mass remains the same. If more than one atom is found in a molecule the ration of average masses remains the same. If two elements have the same atoms but differ in arrangement the ra...
in AP Chemistry (Bozeman, MT: Bozeman Science, 2013), 6 mins
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AP Chemistry, Atomic Models
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in AP Chemistry (Bozeman, MT: Bozeman Science, 2013), 4 mins
In this video Paul Andersen explains how the atomic model has changed over time. A model is simply a theoretical construct of phenomenon and so when we receive new data we may have to refine our model. Ionization energy data resulted in the formation of a quantum model that more accurately reflected the atom.
in AP Chemistry (Bozeman, MT: Bozeman Science, 2013), 4 mins
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