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Life Science

  • Bacterial Motility In this lab, students perform two exercises that investigate microbial motility. One is on a microscopic level, using the “hanging drop” slide preparation method to directly observe motile cells. The second exercise is on a macroscopic level and involves inoculating motility test media. View »
  • Bacteria: The Citrate Test In this lab students perform a test on two different bacteria to determine whether the organisms can use citric acid as their sole carbon source. The citrate test is often performed as part of the IMViC (Indole, Methyl Red, Voges-Proskauer, and Citrate) series of tests used to differentiate common species of enteric bacteria. View »
  • Bees, Butterflies, and Flowers Introduce your students to the symbiotic relationships between these organisms and to their impact on our food supply and environment. Carolina product developer Brent Atkinson offers background information, a brief discussion of each relationship, and tips for using your schoolyard to attract and sustain pollinating insects. View »
  • Dissections in a Flipped Mastery Classroom Dissection plays an essential role in every anatomy and physiology class. As a teacher, you know it’s valuable, but do your students? Show them the value of performing dissections and give them a learning experience that’s authentic and engaging when you use the flipped-mastery approach. View »
  • Muscular Typogram Flex your skills with this muscleman typogram by artist Aaron Kuehn. It offers a unique and creative way to learn the names and locations of muscles. View »
  • Human Body: Muscular System Use this infographic to teach the structure and function of skeletal, cardiac, and smooth muscle. View »
  • How Do They Hiss? and Other Madagascar Hissing Cockroach Questions Answered The Madagascar hissing cockroach is one of the most widely recognized exotic insects because of its large size and dynamic behavior. Read on to learn more about it . . . View »
  • Introduction to Prokaryotes: Bacteria What are bacteria? In this introductory lab students make smears of bacteria on microscope slides from pure cultures, perform a simple stain, and observe their stained slides under a microscope View »
  • Bacterial Hydrolysis of Starch In this lab, students culture two bacteria on potato dextrose agar, which contains starch. When grown on potato dextrose agar, bacteria that can secrete amylase—an enzyme that hydrolyzes starch—create a zone around their colonies in which starch is absent. When the agar is flooded with iodine solution, most of the plate stains dark blue–black, but clear areas are left around colonies that secrete amylase. View »
  • Bacteria: The Indole Test In this lab students perform a differential test to distinguish bacteria based on the production of indole. Bacteria are grown on media containing tryptophan and then treated with Kovac’s reagent. If they possess the enzyme tryptophanase, the bacteria can metabolize tryptophan into indole, pyruvic acid, and ammonia. View »
  • Isolating Bacteria from a Mixture How does a microbiologist isolate bacteria from a sample? In this lab students practice streaking a plate to isolate a single species of bacterium from a known mixture. View »
  • Maggot Michelangelos: Using Artwork to Gain Behavioral Insight In this activity, students use house fly larvae to answer morphological and behavioral questions—all while creating unique artwork! Students create and test hypotheses, and learn about the complete metamorphosis life cycle. View »
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