MS-LS4-6

Use mathematical representations to support explanations of how natural selection may lead to increases and decreases of specific traits in populations over time.

More Stories in MS-LS4-6

  1. Animals

    Surprise! Sixteen tiny wasp species found masquerading as one

    Scientists used new and old tools to overturn 160-year-old ideas about this wasp. They show you can’t tell a wasp by its looks.

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  2. Fossils

    One of the earliest meat-eating mammals was saber-toothed

    Millions of years before the evolution of saber-toothed cats, a newly discovered "hypercarnivore" prowled the forests of what is now San Diego.

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  3. Life

    Explainer: What is an endangered species?

    Threats such as climate change and habitat loss can put species at risk of going extinct. Different words describe that risk.

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  4. Animals

    A new drug mix helps frogs regrow amputated legs

    The treatment helped frogs grow working limbs useful for swimming, standing and kicking. It’ll be a while before people can do that.

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  5. Animals

    See the world through a jumping spider’s eyes — and other senses

    Scientists are teasing out the many ways the spiders’ vision, listening and taste senses differ from ours

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  6. Animals

    Mysterious kunga is the oldest known human-bred hybrid animal

    People bred these animals — part donkey, part wild ass — some 4,500 years ago, probably for use in fighting wars.

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  7. Life

    Scientists Say: Adaptation

    This word refers to a feature of a living thing that helps it better survive in its environment — or the process of that feature evolving in a population.

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  8. Animals

    Cloning boosts endangered black-footed ferrets

    A cloned ferret named Elizabeth Ann brings genetic diversity to a species that nearly went extinct in the 1980s.

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  9. Microbes

    Explainer: Virus variants and strains

    When viruses become more infectious or better able to survive the body’s immune system, they become a type of variant known as a strain.

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