In this episode of Bio On The Go, we explore the foundational elements that make life on Earth possible. Aligned with AP Biology CED 1.2, we'll break down the essential elements—carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur—and explain how they contribute to the structure and function of biological macromolecules. Whether you’re commuting, walking the dog, or cramming before class, this quick yet thorough review will help you understand why these elements matter and how they connect to life’s bigger picture. Let's get into the building blocks of biology!