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Life Science

  • Human Body: Urinary System Teach urinary system structure and function with this infographic. View »
  • Reaction Time and Practice Introduce students to reflexes and reactions, the nervous system, or learning theory with this engaging activity. View »
  • Cardiovascular Diseases In this activity, students differentiate normal and diseased cardiovascular anatomy and physiology. 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 »
  • Bacterial Growth on MacConkey Agar In this lab students culture three bacteria on nutrient agar and MacConkey agar and record the results. View »
  • Sense of Smell and Olfactory Fatigue In this introductory activity, students use fragrant oils to determine the time of olfactory fatigue for both of their nostrils and examine the link between smell and memories. 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 »
  • Ocular Dominance How does the brain process information from both eyes? This short activity introduces the senses, sensation and perception, and evolutionary differences in predator-prey relationships. 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 »
  • Human Body: Cardiovascular System Teach the functions of the cardiovascular system with the help of this infographic. View »
  • Human Body: Identifying Endocrine Tissues In this activity, students identify 6 of the major glands and organs of the endocrine system. View »
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