Uploaded August 2026 | Updated September 2026, 2 weeks ago
khanacademy.org/science/telangana-class-8-biology?lang=en
This lesson introduces students to the fascinating world of microorganisms, highlighting both their beneficial and harmful roles. Students learn how useful microorganisms such as Lactobacillus and yeast are involved in the preparation of curd, bread, and other fermented products, as well as their applications in industry.
The lesson also explains how disease-causing microorganisms, called pathogens, infect humans, animals, and plants, and how they spread through air, contaminated food and water, and vectors such as mosquitoes.
By exploring the body's immune response and preventive measures like hygiene, sanitation, and vaccination, students develop a balanced understanding of microorganisms and their importance in health, agriculture, and everyday life.
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
Timestamps:
Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month.
Support Us: india.khanacademy.org/donate
khanacademy.org/science/telangana-class-8-biology?lang=en
This lesson introduces students to the fascinating world of microorganisms, highlighting both their beneficial and harmful roles. Students learn how useful microorganisms such as Lactobacillus and yeast are involved in the preparation of curd, bread, and other fermented products, as well as their applications in industry.
The lesson also explains how disease-causing microorganisms, called pathogens, infect humans, animals, and plants, and how they spread through air, contaminated food and water, and vectors such as mosquitoes.
By exploring the body's immune response and preventive measures like hygiene, sanitation, and vaccination, students develop a balanced understanding of microorganisms and their importance in health, agriculture, and everyday life.
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!
Timestamps:
Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month.
Support Us: india.khanacademy.org/donate
