This books contains topics of four branches of Zoology , namely, Lower Non-Chordata, Higher Non-Chordata, Cell Biology and Genetics. This textbook is meant for Degree students of all Indian Universities. It has been developed according to UGC Model Curriculum. Certain keynote aspects of this textbook are as follows: > Carefully redrawn diagrams to explain the text. | > Boxed information for those who always want more. | > At the end of each chapter has been provided a wide spectrum of questions such as Long type Answer Questions, Short Type Questions, Very Short Answer Questions, Fill in the Blanks, True and False Questions, MCQ's have also been provided.