8 Year Exporter EN14399-3 and 7 System HR Structural nuts to Islamabad Manufacturers

EN14399-3 and 7 System HV Structural nuts for High-Strength Structural bolting Dimension Standard: EN14399-3 and 7 Metric Size: M12-M36 Material Grade: ISO 898-2 class 8, 10 Finish: Plain, Black Oxide, Zinc Plated, Hot Dipped Galvanized, etc. Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality, Competitive Price, Timely Delivery,Technical Support, Supply Test Reports Please feel free to contact us for more details.  

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    Principles of Evolution, Ecology and Behavior (EEB 122)

    The lecture presents an overview of evolutionary biology and its two major components, microevolution and macroevolution. The idea of evolution goes back before Darwin, although Darwin thought of natural selection. Evolution is driven by natural selection, the correlation between organism traits and reproductive success, as well as random drift. The history of life goes back approximately 3.7 billion years to a common ancestor, and is marked with key events that affect all life.

    00:00 – Chapter 1. Introduction
    03:22 – Chapter 2. History of Evolutionary Studies
    15:59 – Chapter 3. Conditions for Natural Selection
    21:25 – Chapter 4. The Power of Selection and Adaptation
    27:09 – Chapter 5. Drift
    31:10 – Chapter 6. History of Life
    39:33 – Chapter 7. Conclusion

    Complete course materials are available at the Open Yale Courses website: https://open.yale.edu/courses

    This course was recorded in Spring 2009.