This manual describes and explains in detail and in an accessible form the issues that cause the greatest difficulties for students. These are: the life cycle of a cell, the processes of cell division (mitosis and meiosis), features of the formation of germ cells, reproduction and embryonic development of animals, life cycles plants. Schemes and drawings will facilitate the process of mastering complex material. The manual includes questions for self-control. The book will be useful in preparing for final and entrance exams, and will also be of interest to biology teachers.