The for the 9th-grade biology workbook by Sonin, Mamontov, and Zakharov is a popular study aid in Russia designed to complement the textbook "Biology: General Patterns" (Биология: Общие закономерности).

Many tasks in the Sonin/Mamontov workbook are modeled after the OGE (9th Grade State Exam), making the GDZ useful for understanding the specific phrasing required by examiners.

Exercises on mitosis, meiosis, and the ontogenesis of organisms.

While these guides provide direct answers, educators generally recommend using them as a rather than a primary source for copying.

Tasks involving Mendelian laws, heredity, and variation.

Interactions between organisms and their environment. How to Use the GDZ Effectively

The workbook, often authored or co-authored by , includes exercises that range from basic definitions to preparation for the OGE and EGE exams. Key sections typically covered include:

Darwinism, microevolution, and the origins of life.