The meaning of biology is, ""The science of life"", which is derived from the Greek word bios (life), and logos (knowledge). So, Biology is the field of science dealing with Living Being. That's why Biology is also called Life Science.The book circumvents the customary human-centric style of nearly all introductory textbooks, the style which significantly misrepresents our understanding of the diversity of life. Our methodology focusses on the illustration of individual topics and their impact on different living species. For instance, the discussion of the cell-structure of different living things is present in the same chapter. The authors also highlight that it is essential to understand biological science as a whole for a thorough understanding of human biology. The book mainly avoids the use of specialized biological vocabulary where possible, instead it offers the concepts using simple English. This book is equally useful for readers from diverse backgrounds including researchers, professors, students, and biological scientists. Moreover, people having a background in other disciplines can also use this book to grasp the fundamentals of biology.