https://www.khanacademy.org/science/als-k-to-12-science/x46c2fc9f8e023990:2nd-quarter/x46c2fc9f8e023990:classifying-animals-structure-diet-habitat-and-reproduction/e/vertebrates-up 2026-04-08T00:16:02.937952483Z Vertebrates Vertebrates Moumita Sen exercise https://www.khanacademy.org/science/biology-essentials/x35f699f4a3703d4e:untitled-50/x35f699f4a3703d4e:higher-animals/e/vertebrates 2026-04-08T00:54:09.631945657Z Vertebrates This exercise tests the salient features of vertebrates and the differences between Chondrichthyes, Osteichthyes, Amphibia, Reptilia, Aves, and Mammalia. Moumita Sen exercise https://www.khanacademy.org/science/grade-11-biology-snc-aligned/x58c107ba92d3f0b2:evolution-and-biodiversity-classification/x58c107ba92d3f0b2:diversity-in-animals-vertebrates/a/linking-birds-and-dinosaurs 2026-03-03T19:00:45.163693614Z Linking birds and dinosaurs article https://www.khanacademy.org/science/revision-term-1-od-grade-9-life-science/x26da6cb4aecf5718:week-1/x26da6cb4aecf5718:diversity-in-living-organisms/e/vertebrata-i 2026-03-06T17:50:38.494926415Z Vertebrata - I This exercise is about the classes Cyclostomata, Pisces, and Amphibia. Nivedhitha exercise https://www.khanacademy.org/science/revision-term-1-od-grade-9-life-science/x26da6cb4aecf5718:week-1/x26da6cb4aecf5718:diversity-in-living-organisms/e/vertebrata-ii 2026-03-06T17:50:38.494926415Z Vertebrata - II This exercise is on the vertebrate classes Reptilia, Aves, and Mammalia. Nivedhitha exercise