Search for tag: "bio"

Making of the Fittest: Evolution of the Stickleback Fish

Natural selection leads to the evolution of new traits. In this educational video, see how stickleback fish have adapted to live permanently in freshwater environments. Explore a case study of…

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Natural Selection and the Rock Pocket Mouse — HHMI BioInteractive Video

How quickly can natural selection work? "The Making of the Fittest: Natural Selection and Adaptation" tells the story of a living example of Darwin's process of natural selection and…

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Galapagos Finch Evolution - HHMI BioInteractive Video

The Galápagos finches remain one of our world’s greatest examples of adaptive radiation. Watch as evolutionary biologists Rosemary and Peter Grant detail their 40-year project to…

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Hardy-Weinberg Equation

In this video Paul Andersen explains the elements in the Hardy-Weinberg equation; including the allele frequency and phenotype frequency. He begins with a brief explanation of phenotypes and…

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Ancient Ice Reveals Earth's Climate History

Ancient ice is helping researchers learn about Earth’s past climate, and a key stop on the scientific journey is a huge freezer in suburban Denver called the National Ice Core Laboratory. (Aug.…

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A Brief History of Geologic Time

PBS Member Stations rely on viewers like you. To support your local station, go to http://to.pbs.org/DonateEons ↓ More info below ↓ By looking at the layers beneath our feet, geologists…

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Evolution - Part 1 of 7 - Darwin's Dangerous Idea

Darwin's Book : "Origin of Species" Download ( pdf ): http://www.mediafire.com/?39l9wwiurjns48y Read: http://archive.org/stream/originofspecies00darwuoft#page/n0/mode/2up

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The Crab-Eating Macaque

This is a video of the crab-eating macque taken from the BBC's Planet Earth documentary series.

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Evolution - Part 2 of 7 - Great Transformations

Darwin's Book: "Origin of Species" Download ( pdf ): http://www.mediafire.com/?39l9wwiurjns48y Read: http://archive.org/stream/originofspecies00darwuoft#page/n0/mode/2up

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Evolution - Part 7 of 7 - What About God?

Darwin's Book "Origin of Species": Download (pdf): http://www.mediafire.com/?39l9wwiurjns48y Read: http://archive.org/stream/originofspecies00darwuoft#page/n0/mode/2up

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Learn to Use Legacy RefWorks in Twenty Minutes

Whether you are new to RefWorks are just need to brush up on the basics, these tutorials will help you learn some basic features to get started using RefWorks

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Extinction

Video that described mass and background extinction rates.

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Intrinsic Isolation

Video describing non-geographic isolation mechanisms that separate can species.

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Using Fitness Landscapes to Visualize Evolution in Action

Bjørn Østman and Randy Olson demonstrate how fitness landscapes can be used to visualize concepts about evolution that are typically hard to understand. Music by STRFKR -…

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Negative vs. Positive Pressure Ventilation

This video covers the difference between negative and positive pressure ventilation. Negative pressure ventilation is normal physiologic respiration, while positive pressure ventilation is due to…

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Lung Volume Explaination

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ECG: The Einthoven Leads & The Mean Electrical Axis

We demonstrate how to record the Einthoven leads and then how to construct the mean electrical axis from the recording. The Einthoven leads are differential leads because our differential amplifier…

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Animation Summation of Postsynaptic Potentials

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Professor Fink: Cellular Respiration

I have recorded a "newer" version of Cellular Respiration on YouTube, entitled: BIOLOGY; CELLULAR RESPIRATION (2012): http://www.youtube.com/watch?v=65434N6JYCA Professor Fink…

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Metabolism - Part 2: Glycolysis and Lactic Acid Fermentation

This video discusses the first step of cellular respiration - glycoloyis in a manner easy to understand but in enough detail to be useful.

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Metabolism - Part 1: Overview of Cellular Respiration

This video discusses the body's need for cellular respiration and what is actually happening to provide the energy to make ATP. In the next videos of this series, we discuss the 4 main parts of…

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Ionic & Covalent Bonds

This video walks you through how to recognize bonding patterns.

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PCR - Polymerase Chain Reaction

PCR technique (Polymerase Chain Reaction), Animation. It is a technique used to make multiple copies of a DNA segment of interest, generating a large amount of copies from a small initial simple.…

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Chromatin, Histones and Modifications

http://ratemyscience.com/ Publish and rate science Cathepsin L as a protease responsible for proteolytically processing the N-terminal H3 tail. Cell. 2008 Oct 17;135(2):284-94. Chromatin is the…

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Operon LAC

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mRNA Splicing

NDSU Virtual Cell Animations Project animation 'mRNA Splicing'. For more information please see http://vcell.ndsu.edu/animations Before being used in translation, mRNA must be spliced.…

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Transcription

NDSU Virtual Cell Animations Project animation 'Transcription'. For more information please see http://vcell.ndsu.edu/animations Transcription is a vital process in biological…

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DNA Transcription (Advanced Detail)

The process of copying DNA into messenger RNA (mRNA) is called transcription. Transcription factors assemble at the promoter region of a gene, bringing an RNA polymerase enzyme to form the…

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DNA Replication (Advanced Detail)

Both strands of the DNA double helix act as templates for the new DNA strands. Incoming DNA is unraveled by the enzyme helicase, resulting in the 3' strand and the 5' strand. The 3'…

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Supercoiling

Microbiology: An Evolving Science 3rd edition Copyright: WW Norton 2016 Supercoiling of DNA ch07a04 Topoisomerases

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