DNA from the Beginning - An animated primer of 75 experiments that made modern genetics. NOVA | The Zoo of You By Neil Shubin Posted 10.26.09 NOVA You may not feel much like a shark, fruit fly, or worm, but you share many aspects of your anatomy and physiology with these and all other animals on Earth. All the various bits and pieces of you–organs, bones, nerves, even your genes–show up in different but fundamentally similar forms in other animals, in some cases animals that lived half a billion years ago, revealing how all creatures on Earth, including you, are just variations on a theme. Launch Interactive In this interactive, see how closely parts of your body match those in other animals, from sharks to fruit flies. Neil Shubin is professor of anatomy at the University of Chicago. Image Credits (embryo) Public Domain Embryo Images: (shark, fruit fly, worm) illustrations by Kalliopi Monoyios, taken from Your Inner Fish: A Journey Into the 3.5 Billion-Year History of the Human Body (Pantheon Books, 2008) (body) © Mario Castello/Corbis Body images: (Tiktaalik, Pterosaur, sea anemone) (head)
Peppered Moth Simulation Name:______________________________________________ Objective: Simulate changes in moth population due to pollution and predation, and observe how species can change over time. Introduction: Charles Darwin accumulated a tremendous collection of facts to support the theory of evolution by natural selection. One of his difficulties in demonstrating the theory, however, was the lack of an example of evolution over a short period of time, which could be observed as it was taking place in nature. The economic changes known as the industrial revolution began in the middle of the eighteenth century. Instructions: Click the link below to read more information on Kettlewell's study of moths. After 5 minutes record the % of dark moths and light moths - you will need this information later. Peppered Moth Simulation at peppermoths.weebly.com Data and Analysis Read the background information and answer the questions as you go. Life Cycle of the Peppered Moth 1. 2. 3. 4. 5. 6. Impact of Pollution 7. 8. 9.
Modern genetics Evolution and Natural Selection Nature encourages no looseness, pardons no errors - Ralph Waldo Emerson I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection. In this lesson, we wish to ask: How did observations in nature lead to the formulation of the theory of evolution? The (R)Evolution of Theory The theory of evolution is one of the great intellectual revolutions of human history, drastically changing our perception of the world and of our place in it. In other words, all of the similarities and dissimilarities among groups of organisms that are the result of the branching process creating the great tree of life (see Figure 1), were viewed by early 19th century philosophers and scientists as a consequence of omnipotent design. However, by the 19th Century, a number of natural historians were beginning to think of evolutionary change as an explanation for patterns observed in nature. Darwin's Theory The Process of Natural Selection Variation. Figure 4 Summary
Extraordinary Adaptation Mutations Hands-on Activities for Teaching Biology to High School or Middle School Students by Drs. Ingrid Waldron and Jennifer Doherty, University of Pennsylvania The expression "hands-on, minds-on" summarizes the philosophy we have incorporated in these activities - namely, that students will learn best if they are actively engaged and if their activities are closely linked to understanding important biological concepts. Many of our activities are explicitly aligned with the Next Generation Science Standards, as indicated by (NGSS) in the descriptions below and the links to the right. To accommodate limited budgets, most of our activities can be carried out with minimum equipment and expense for supplies. Additional resources for teaching biology are available at More Minds on Activities for Teaching Biology. Read More Intro and Biological Molecules Is Yeast Alive? Students evaluate whether the little brown grains of yeast obtained from the grocery store are alive by testing for metabolism and growth. Enzymes Help Us Digest Food(revised, July, 2016) Who Took Jerell's iPod?
Charles Darwin's ecological experiment on Ascension isle 1 September 2010Last updated at 11:39 By Howard Falcon-Lang Science reporter, BBC News Cloud forest now forms a damp oasis on Ascension's highest peak A lonely island in the middle of the South Atlantic conceals Charles Darwin's best-kept secret. Two hundred years ago, Ascension Island was a barren volcanic edifice. Today, its peaks are covered by lush tropical "cloud forest". What happened in the interim is the amazing story of how the architect of evolution, Kew Gardens and the Royal Navy conspired to build a fully functioning, but totally artificial ecosystem. By a bizarre twist, this great imperial experiment may hold the key to the future colonisation of Mars. The tiny tropical island of Ascension is not easy to find. Its existence depends entirely on what geologists call the mid-Atlantic ridge. Ascension is one of a number of volcanic islands in the South Atlantic However, because Ascension occupies a "hot spot" on the ridge, its volcano is especially active. A new island was born.