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Life Science

  • 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 »
  • Bacterial Growth on MacConkey Agar In this lab students culture three bacteria on nutrient agar and MacConkey agar and record the results. View »
  • Introduction to Invertebrates In this lab, students study representatives of several invertebrate groups. 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 »
  • The Dogfish Shark—Structure and FUNction! Use this simple guide to connect form and function during your next dogfish dissection activity. 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 »
  • Copying Nature’s Success: Teaching Students About Biomimetics Ready to create a model home that draws on biomimetics? In this activity, students research, design, and build structures that incorporate ideas inspired by the natural world. View »
  • Easy Variation and Natural Selection Lessons with Wisconsin Fast Plants® Seed Disks Explore a technique that makes teaching variation and natural selection lessons with Fast Plants® easier than ever. In this activity, students examine the effects an abiotic environmental change (salinity) has on an experimental plot of Fast Plants®. Includes detailed background information and instructions. View »
  • Fetal Pig Dissection Pigs are excellent and engaging specimens for studying mammalian anatomy. They exhibit hair, a muscular diaphragm, a 4-chambered heart, and mammary glands. View »
  • Frog Dissection Looking for an introductory frog dissection activity? This one requires only dissecting scissors, and you can complete it in 1–2 class periods. View »
  • Infographic: Human Body Systems Teach the main body systems with the help of this infographic. View »
  • Next Generation Dissections Dissection can and should be part of your implementation of 3-dimensional learning. Carolina can help you make this transition with updated kits and resources. View »
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