This book entitled “RECENT BIOLOGICAL STUDIES”, prepared by different researchers specializing in various fields of biological science, consists of ten chapters. The topics and applications discussed in this book are tried to be explained together with theoretical information. I would like to thank the authors who contributed to the emergence of this book with their valuable chapters, and the publishing team who took part in the preparation and publication of this book, and I hope that this book will be useful to you, esteemed researchers, and the students.