BIOL 155: Principles of Biology I

Discover the complex world of sea urchin reproduction, focusing on the essential role the cortical reaction plays in egg fertilization. Uncover common myths surrounding this process and learn what actually happens at the cellular level. Gain insight into how the formation of a fertilization envelope is crucial for successful fertilization.

Explore the definitions of tissue, organ, and organ system. Understand the distinctions and interconnectedness between these components. Get an overview of the human body's eleven major organ systems and their functions.

Explore the differences in DNA, RNA, and protein synthesis between eukaryotic and prokaryotic cells. Understand the benefits of separation in eukaryotes and the efficiency of proximity in prokaryotes. Both systems reveal the ingenious ways cells adapt to their needs.

Explore the intricate layers of organization in the human body. From molecules to the complete organism, understand the sequential formation of our biological structure. Uncover the reasons behind incorrect hierarchical interpretations.

Explore the world of spontaneous reactions, focusing on cellular respiration. Learn how our cells convert glucose into energy-rich ATP, driving vital life functions.

Explore the incredible process of cell differentiation and how cells become specialized through the production of tissue-specific proteins. Witness the unique roles of muscle cells and neurons as they create essential proteins for their functions. Uncover the symphonic beauty of life's complexity through this fascinating biological journey.