For checking work, a separate "Ready Homework" (GDZ) manual by Zakharov and Zakharova is available on NZDR.ru , providing detailed answers to end-of-chapter questions. Core Topics Covered
Heredity, variation, and the foundations of biotechnology. onlain uchebnik po biologii 10 klass zakharov
Structure and functions of the cell, chemical composition, and metabolism. For checking work, a separate "Ready Homework" (GDZ)
Reproduction and individual development (ontogeny) of organisms. Биология For checking work
You can find complete digitized copies of the textbook (7th edition, 2019) on educational portals like Edu.Tatar , which includes chapters on cytology, genetics, and molecular biology.