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Showing 1-18 of 18 Resources
  • Counting the Rings

    Counting the Rings

    Image of the Week

    An otolith from a lanternfish (Gymnoscopelus nicholsi) is used to estimate the fish’s age and growth rate.

  • Super Stoma

    Super Stoma

    Image of the Week

    The stomata of grasses (singular stoma) function more efficiently than those of other plants.

  • Under the Hemiparasite

    Under the Hemiparasite

    Image of the Week

    Many of the 1400 or so species of mistletoes are hemiparasites—they obtain at least part of their nutrition from the host tree.

  • Slug Power

    Slug Power

    Image of the Week

    The sea slug, Elysia crispata belongs to a group called the sacoglossans—mostly herbivores that feed, mate and lay eggs on algae.  

  • Crystals and the Color of Skin

    Crystals and the Color of Skin

    Image of the Week

    The panther chameleon alters the arrangement of tiny crystals in its skin to change color.

  • Twinkle, Twinkle Little Desmid

    Twinkle, Twinkle Little Desmid

    Image of the Week

    These tiny star-shaped organisms are single-celled, freshwater green algae called desmids.

  • Coral Fluorescence

    Coral Fluorescence

    Image of the Week

    Most corals contain proteins that emit light, or fluoresce, when light shines on them.

  • A Predator in the Plankton

    A Predator in the Plankton

    Image of the Week

    The comb jelly (Beroe cucumis) uses its large mouth and cilia-powered motor to prey upon members of the plankton family, including other ctenophores.

  • Ocean Species Respond to Climate Change

    Ocean Species Respond to Climate Change


    (29 min 39 sec) Coral reefs, how they are threatened by climate change, and how to protect them.

  • Let's Stick Together

    Let's Stick Together

    Image of the Week

    Sponges feed themselves through chambers of specialized cells.

  • Click and Learn App

    Click and Learn App

    Apps and eBooks

    Interactively explore topics in biology with the Click and Learn app. Now available from the Apple App Store, Google Play, and Amazon Apps!

  • Bacterial Quorum Sensing

    Bacterial Quorum Sensing

    Click & Learn

    Understand how quorum sensing works by reasoning through experiments involving genetically-engineered bioluminescent bacteria.

  • Symbiotic Bioluminescence

    Symbiotic Bioluminescence

    Click & Learn

    Explore the biology of the symbiotic relationship between the Hawaiian Bobtail squid and bioluminescent bacteria Vibrio fischeri.

  • Eavesdropping on Tiny Conspiracies

    Eavesdropping on Tiny Conspiracies


    (58 min 29 sec) The quorum sensing system is a target for a new class of drugs that interfere with virulence without killing bacteria.

  • Biodiversity at a Snail's Pace

    Biodiversity at a Snail's Pace


    (58 min 29 sec) Cone snails have evolved many different toxins for different uses. Total molecular biodiversity may number in the millions.

  • Shedding Light on an Invisible World

    Shedding Light on an Invisible World


    (58 min 29 sec) Bacteria are capable of communicating and coordinating their activities with a molecular signaling system called quorum sensing.

  • From Venoms to Drugs

    From Venoms to Drugs


    (58 min 29 sec) Venomous carniverous cone snails are a rich source of molecules for scientific research and potential drug development.

  • Exploring Biodiversity: The Search for New Medicines

    Exploring Biodiversity: The Search for New Medicines


    What medical secrets do venomous snails hold? How can listening in on bacterial conversations help develop new antibiotics? In four presentations, Dr. Bonnie L. Bassler and Dr. Baldomero M. Olivera reveal how a deeper understanding of nature and biodiversity informs their research into new medicines.

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