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Resultados

Mostrando resultados 13 - 24 de 206, página 2 de 18.

  1. The Origin of Flight: What Use Is Half a Wing?

    In this video, biologist Ken Dial demonstrates that birds use their wings for more than just flying, which may help us understand how dinosaurs used their small wing-like limbs before the evolution of flight.

    Temas:
    Experimental Design
    Paleobiology
    Skin & Musculoskeletal System
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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  2. A Genetic Treatment for Sickle Cell Disease

    This video presents an intriguing phenomenon: two patients who carry the same genetic variation, which is known to cause sickle cell disease, have very different outcomes.

    Temas:
    Genetic Disease
    Patterns of Inheritance
    Gene Expression & Regulation
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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  3. Seed Dispersal and Habitat Fragmentation

    This video follows scientists studying the seeds that brown spider monkeys disperse in a tropical forest of Colombia in order to inform and improve reforestation efforts.

    Temas:
    Conservation
    Human Population & Impacts
    Plant Anatomy & Physiology
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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  4. Tracking Lion Recovery in Gorongosa National Park

    This video describes how scientists in Gorongosa National Park are using GPS satellite collars and motion-sensitive cameras to gather data about the recovery of the park’s lion population.

    Temas:
    Conservation
    Human Population & Impacts
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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  5. Pyruvate Dehydrogenase

    This animation shows how the pyruvate dehydrogenase enzyme complex converts pyruvate into acetyl-CoA. It is the second of six animations about cellular respiration.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  6. ATP in Use

    This animation shows two examples of how the cell uses energy from ATP. It is the sixth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  7. ATP Synthesis

    This animation shows how the proton gradient across the mitochondrial membrane powers the ATP synthase enzyme to make ATP. It is the fifth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  8. Citric Acid Cycle

    This animation shows the reactions of the citric acid cycle, which splits off carbon atoms and generates energy-rich reduced forms of cofactor molecules. It is the third of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  9. Electron Transport Chain

    This animation shows how the enzyme complexes of the electron transport chain harvest energy from cofactor molecules to pump protons across the mitochondrial membrane and establish a chemical gradient. It is the fourth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  10. Glycolysis

    This animation shows how glycolysis converts glucose into pyruvate through a series of enzyme reactions. It is the first of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

    Temas:
    Cellular Energetics
    Enzymes & Reactions
    Macromolecules
    Grade Levels:
    College
    High School — AP/IB

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  11. The Effects of Fungicides on Bumble Bee Colonies

    In this video, entomologist Shawn Steffan describes an experiment designed to study the effect of fungicides on bumble bee colonies.

    Temas:
    Conservation
    Human Population & Impacts
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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  12. The Search for a Mutated Gene

    This video describes the case of a patient with retinitis pigmentosa (RP), a progressive disease that leads to blindness, and how physician-scientist Dr. Ed Stone approached the search for the causal mutation.

    Temas:
    Genetic Disease
    Genomics
    Biotechnology
    Grade Levels:
    College
    High School — AP/IB
    High School — General

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