https://www.khanacademy.org/science/up-science-grade-6-revision-course-full-term/x017c12e57b64cfa8:week-2/x017c12e57b64cfa8:untitled-216/e/cells 2025-08-04T12:23:36.052124233Z Cells Let's do some questions vibhor exercise https://www.khanacademy.org/science/ap-biology/cell-structure-and-function/cell-structures-and-their-functions/e/cell-structures-and-their-functions-exercise 2026-04-05T18:28:15.377289243Z Cell structures and their functions Test your knowledge of cell structures and their functions! Ashley Mucha exercise https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:organization-in-the-human-body/e/understand-organization-in-the-human-body 2026-04-03T18:30:01.793877038Z Understand: organization in the human body Check your understanding of organization in the human body in this set of free practice questions aligned to NGSS standards. Khan Academy exercise https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-2/x04828215b460a495:the-world-of-microorganisms-part-i-ii/e/lo-5-1-micro-organisms-fundamentals 2026-04-06T02:41:58.374508961Z Micro-organisms (Fundamentals) Let's solve some problems to better understands some fundamental properties of micro-organisms. Aakash Bagga exercise https://www.khanacademy.org/science/ncert-class-8-science/x55541eeaec8b3a9a:microorganisms-friend-and-foe/x55541eeaec8b3a9a:how-are-we-connected-to-microbes/e/how-are-we-connected-to-microbes 2026-04-06T02:41:58.374508961Z How are we connected to Microbes? This exercise explores the amazing ways microbes are woven into our lives—from keeping our environment clean to providing us with food, fuel, and even oxygen! Bitasta Datta exercise https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-2/x04828215b460a495:the-world-of-microorganisms-part-i-ii/e/methods-of-food-protection 2025-04-06T12:02:31.479792688Z Methods of food protection Let's practice! vibhor exercise https://www.khanacademy.org/science/revision-term-2-tg-biology-class-8/x04828215b460a495:week-2/x04828215b460a495:the-world-of-microorganisms-part-i-ii/e/nitrogen-fixing-and-nitrogen-cycle 2026-04-09T13:10:38.304888012Z Nitrogen fixing and nitrogen cycle Let answer some questions! Shankar R exercise https://www.khanacademy.org/science/ms-biology/x0c5bb03129646fd6:cells-and-organisms/x0c5bb03129646fd6:cells-organisms/e/understand-cells-and-organisms 2026-02-11T03:53:53.051913885Z Understand: cells and organisms Check your understanding of cells and organisms in this set of free practice questions. Khan Academy exercise