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Welcome to the eGyanKosh portal, your go-to resource for comprehensive educational materials from Indira Gandhi National Open University (IGNOU). In this section, we present Unit-4: Beneficial Roles of Micro-Organisms, a crucial component of your academic journey for the year 2025. This unit not only enhances your understanding of the diverse functions that micro-organisms serve in various ecosystems, but it also underscores their significance in areas such as agriculture, medicine, and biotechnology. Dive into this rich study material, available for free download, and equip yourself with the knowledge to appreciate the invaluable contributions of micro-organisms to our world. Whether you’re a student or a curious learner, this resource is designed to support your educational pursuits effectively.