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Life Science

  • Constructing a Cladogram with Hydra, Planaria, and Daphnia In this lab students compare the body structure and functions of three invertebrates to that of a vertebrate. They use their data to construct a cladogram. 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 »
  • Infographic: Human Body Systems Teach the main body systems with the help of this infographic. View »
  • Introduction to Sterile Technique In this lab, students practice transfer of a bacterial culture using sterile technique. 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 »
  • 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 »
  • Introduction to Prokaryotes: Cyanobacteria In this lab students observe two examples of cyanobacteria and make a simple comparison to a eukaryotic green alga. 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 »
  • 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 »
  • Carolina LabSheets™: Seedling Genetics (Sorghum) Students study F2 seedlings to discover how a color phenotype is inherited in sorghum. They can study a cross involving green and albino plants or, alternatively, a cross involving red and green plants. 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 »
  • Testing for Segregation of Alleles In this lab, students test corn pollen for evidence of the segregation of alleles. View »
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