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Life Science

  • Introduction to Prokaryotes: Cyanobacteria In this lab students observe two examples of cyanobacteria and make a simple comparison to a eukaryotic green alga. View »
  • Introduction to Prokaryotes: Archaea In this lab, students are introduced to Halobacterium, a representative of the Archaea, one of the three domains of life (along with Bacteria and Eukarya). View »
  • Carolina Quick Tips®: Next Top Model (Organism) Students seem to consistently struggle to understand Punnett squares and grasp Mendel’s laws. Bringing live organisms into your 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 Growth on MacConkey Agar In this lab students culture three bacteria on nutrient agar and MacConkey agar and record the results. 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 »
  • The Science of Fear You know that hair-raising feeling you get when you’re scared? By undergoing a specific physiological response, your body is primed to confront, and hopefully overcome, whatever scary situation you face. View »
  • Bacterial Hydrolysis of Casein In this lab, students culture two bacteria on skim milk agar. The protein casein gives milk its white color. Some bacteria secrete protease enzymes that can hydrolyze casein. When these bacteria are grown on skim milk agar a clear area develops around the colonies, indicating that casein has been hydrolyzed into its component amino acids. View »
  • 32 Standards Met with Wisconsin Fast Plants® Engage students and support NGSS with classroom-tested, tried-and-true Wisconsin Fast Plants®. A leading expert on the use of Fast Plants® in education recommends investigations and kits to support K–12 NGSS. 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 »
  • 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 Sterile Technique In this lab, students practice transfer of a bacterial culture using sterile technique. View »