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Life Science

  • What Genomics Says about Being Human Part I Drastic reductions in the cost of determining the nucleotide sequences of chromosomes have led to an explosion in the field of genomics, enabling scientists to add remarkable depth to our understanding of what it means to be human. 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 »
  • Human Body: Cardiovascular System Teach the functions of the cardiovascular system with the help of this infographic. 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: 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 »
  • Human Body: Reproductive System Teach the male and female reproductive systems with the help of this infographic. 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 »
  • A Sexual Experience? There are 2 primary forms of reproduction: asexual and sexual. While the majority of the animal kingdom reproduces sexually, many reproduce asexually—and some organisms have the ability to perform both ways! 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 »
  • Introduction to Sterile Technique In this lab, students practice transfer of a bacterial culture using sterile technique. 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 »
  • Human Body: Digestive System Teach the main functions of the digestive system with the help of this infographic. View »
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