PreparED Study Materials
Videos
Griffith's Discoveries in Bacterial Transformation and Pneumonia
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover how the protein coat from pathogenic cells can transform nonpathogenic cells, the surprising role of heat-killed pathogenic cells in causing pneumonia, and the transfer of pathogenic traits from one cell to another. Join us on this journey of scientific exploration as we unravel the mysteries of bacterial transformation and more.
Comparing Human & Amphibian Circulatory Systems: What's Shared
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the similarities and differences between the circulatory systems of amphibians and humans. Understand the distinctions in heart chambers, blood pressure, and where these two species align in their circulatory features.
Decomposers: Ecosystem Balance & Life's Unsung Heroes
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the indispensable role of decomposers in ecosystems. Understand their impact on nutrient cycling, energy flow, and ecological balance. Realize what Earth would face without these vital organisms.
Baldness & Hair Follicles: Delving into Hair Miniaturization
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Learn about male pattern baldness as we break down the science behind shrinking hair follicles and their effects on hair thinning. Learn why bald men still have hair follicles and what happens to them over time. Ideal for anyone keen to understand the biology of hair loss.
Meal to Digestion: Grasping Distension & Body's Control Center
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Discover what happens in your body after a hearty meal! Learn about the concept of 'distension' and how nerve cells act as messengers to your control center, orchestrating the digestive process.
Bacterial Genetic Variation: Meiosis Excluded from the Equation
Want To Learn More? To watch the entire video and ALL of the videos in the series:
full solution
Explore the world of microbiology in this video as we investigate the processes that lead to genetic variation in bacterial populations. Learn about transduction, transformation, conjugation, and mutation, and discover why meiosis, a process occurring in sexually reproducing organisms, is not a source of genetic variation in bacteria.







