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  • Developing an Explanation for Tuskless Elephants

    Developing an Explanation for Tuskless Elephants

    Activities

    In this activity, students use scientific evidence and reasoning to construct an explanation of and develop an argument for tusklessness in elephant populations.

  • Mate Choice in Spiders

    Mate Choice in Spiders

    Data Points

    Scientists investigated how males choose their mates in a species of sexually cannibalistic spiders.

  • Analyzing Data on Tuskless Elephants

    Analyzing Data on Tuskless Elephants

    Activities

    In this activity, students analyze data to investigate tusklessness in elephant populations.

  • Great Transitions Interactive: Human Origins

    Great Transitions Interactive: Human Origins

    Click & Learn

    Examine fossil skeletons and footprints of early humans and compare them to skeletons of modern humans and chimpanzees to discover how different traits have evolved over time.

  • Developing an Explanation for Mouse Fur Color

    Developing an Explanation for Mouse Fur Color

    Activities

    Students collect and analyze evidence for each of the major conditions for evolution by natural selection to develop an explanation for how populations change over time. Also available in Spanish.

  • Pelvic Evolution in Sticklebacks

    Pelvic Evolution in Sticklebacks

    Data Points

    Scientists used SNP genotyping in populations of freshwater stickleback fish to determine the genetic mutations responsible for the impaired development of pelvises and spines.

  • 3D Scan of Tiktaalik Fossil – Humerus

    3D Scan of Tiktaalik Fossil – Humerus

    3D Models

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil – Pelvis

    3D Scan of Tiktaalik Fossil – Pelvis

    3D Models

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil – Pectoral Fin

    3D Scan of Tiktaalik Fossil – Pectoral Fin

    3D Models

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil –  Body

    3D Scan of Tiktaalik Fossil – Body

    3D Models

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • 3D Scan of Tiktaalik Fossil –  Skull

    3D Scan of Tiktaalik Fossil – Skull

    3D Models

    3D-scans of fossil bones of Tiktaalik, a creature with a mix of features common to fish and tetrapods.

  • New Laetoli Footprints and Hominin Body Size

    New Laetoli Footprints and Hominin Body Size

    Data Points

    Scientists were excavating a site in Laetoli, Tanzania when they uncovered two new sets of hominin tracks located about 150 meters south of the tracks found by Mary Leakey in the 1970’s. They estimated the heights of the two individuals using the size and shape of the footprints.

  • Origins of Antibiotic Resistance

    Origins of Antibiotic Resistance

    Data Points

    Scientists collected bacteria from locations that had never been exposed to humans or modern antibiotics to determine if antibiotic resistance is newly evolved since the introduction of antibiotics or has evolved independently.

  • Patterns in the Distribution of Lactase Persistence

    Patterns in the Distribution of Lactase Persistence

    Activities

    Students explore the geographic distribution of lactase persistence around the world by analyzing real data collected by scientists.

  • Mimicry in a Diverse Community of Arthropods

    Mimicry in a Diverse Community of Arthropods

    Data Points

    Researchers exposed arthropod mimics that use a golden patch to warn of unpalatability to predators with different prey preferences to determine how effective their warnings were.

  • Think Like a Scientist: Natural Selection in an Outbreak

    Think Like a Scientist: Natural Selection in an Outbreak

    Scientists at Work

    (7 min 29 sec) This video brings us to the front lines of the 2013–2015 Ebola outbreak in west Africa and explains how scientists monitored the evolution of the virus by analyzing its genome.

  • Dating Corn Domestication Using Carbon Isotopes

    Dating Corn Domestication Using Carbon Isotopes

    Data Points

    To study the change in diet as human populations changed lifestyles from hunter-gatherers to agriculturalists, scientists measured carbon isotopes in the collagen tissues of human skeletons from North America.

  • How Animals Use Sound to Communicate

    How Animals Use Sound to Communicate

    Click & Learn

    Using elephants, finches, bats, and moths, as case studies, explore different aspects of how animals use sound to communicate.

  • Selection for Tuskless Elephants

    Selection for Tuskless Elephants

    Scientists at Work

    (6 min 39 sec) Working in Gorongosa National Park, Mozambique, Dr. Joyce Poole and colleagues made a striking observation: many female elephants lack tusks.

  • Understanding Variation

    Understanding Variation

    Activities

    This lesson complements the film The Biology of Skin Color and discusses variation in human skin color and polygenic inheritance. Also available in Spanish.

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