This book is important in the UG students. Neat labelled diagrams, high matter contents, up to date knowledge and simple language are the feature of this book. Students are helpful for the practicals. students are study the basic information of the different phylum and classes. some cytological preparation is carried out the simple method. This book is also includes the vertebrates and invertebrates characters with examples. It is also study skeleton, ecological pyramids, evolution and ethology.