In biology, symmetry breaking refers to the process of breaking of uniformity or reducing the number of points to view invariance in order to produce a more improbable and structured state. It occurs when symmetry with a specific axis is lost in order to create polarity. This polarity helps the biological system in differentiating between different poles along an axis. Cells must first establish polarity by a symmetry-breaking event, before organs and tissues become polar. The fact that symmetry breaking occurs at all scales reflects its importance in biology. It can be found at the subcellular level, macromolecular level, and even at the organ and tissue levels. This book provides significant information to help develop a good understanding of symmetry breaking in biology. It presents researches and studies performed by experts across the globe. Those in search of information to further their knowledge will be greatly assisted by this book.