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Life Science

  • 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 »
  • Mitosis Match Up: Student Activity Sheet With this activity, students identify and label pictures of plant cells in varying phases of the cell cycle. 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 »
  • Infographic: What's Your Blood Type? Use this exciting infographic as a teaching aid for your classes as your students discover the ABO/Rh blood groups. View »
  • Invertebrate Biodiversity with Berlese Funnels Using soil invertebrates, students identify the number of species present in a soil sample and the number of individuals within a species. With some simple math, they can then calculate the density of invertebrates in a plot. View »
  • Bacterial Hydrolysis of Lipids In this lab, students culture two species of bacteria on agar medium that contains an emulsion of plant oils and the dye, sprit blue, which forms a complex with the triglycerides of the oils and gives an opaque blue color to the agar. Colonies of bacteria that can secrete lipase, an enzyme that hydrolyzes triglycerides, develop a light area or “halo” in the surrounding medium, due to the diffusion of lipase into the medium and the resultant breakdown of the oil/spirit blue complex. View »
  • Introduction to Protista: Euglena Euglena was once studied as a simple animal by zoologists and as a simple plant by botanists. How does this protist combine some characteristics of animals with the plant-like ability to photosynthesize? View »
  • Bringing Real-World STEM Experiences to the Classroom by using miniPCR For schools grappling with budget constraints, biotech equipment costs can make it difficult to give students true-to-life learning experiences. One biology teacher has found a new resource that makes real-world instruction more affordable. View »
  • Infographic: Bring Your Genetics Lessons to Life with Model Organisms Carolina offers unique opportunities to work with model organisms—such as genetic corn (Zea mays), Wisconsin Fast Plants® (Brassica rapa), and fruit flies (Drosophila melanogaster)—in your genetics labs. View »
  • Carolina's Recommended Reading for AP® Biology Teaching AP® Biology this year? Go beyond the textbook and take students on an exploration of key concepts with these teacher-tested and recommended books. View »
  • Introduction to Blood Types In this lab, students are introduced to the human ABO blood groups. View »
  • Snakeheads Invade the United States Teach your students about the challenges nonnative species pose by focusing on a current example, the northern snakehead fish. Native to China, Russia, and Korea, this fish has established breeding populations in several states. Find out how this might have happened and what scientists are doing about it. View »
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