https://www.khanacademy.org/science/revision-term-1-ka-biology-grade-11/x1474e0ca4285b2f5:week-1/x1474e0ca4285b2f5:animal-kingdom/e/higher-invertebrates 2024-08-15T06:03:54.799148768Z Echinodermata, Hemichordata, and Chordata This exercise is on the salient features of the phyla Echinodermata, Hemichordata, and Chordata. Moumita exercise https://www.khanacademy.org/science/grade-11-biology-snc-aligned/x58c107ba92d3f0b2:evolution-and-biodiversity-classification/x58c107ba92d3f0b2:diversity-in-animals-invertebrates/e/phylum-porifera 2026-04-08T01:15:04.085520103Z Asymmetrical animals and diploblastic animals This exercise is on the phylum Porifera, Cnidaria, and Ctenophora Moumita Sen exercise https://www.khanacademy.org/science/revision-term-1-ka-biology-grade-11/x1474e0ca4285b2f5:week-1/x1474e0ca4285b2f5:animal-kingdom/e/porifera-cnidaria-and-ctenophora 2024-08-15T06:03:54.799148768Z Porifera, Cnidaria, and Ctenophora This exercise explores the salient features of the phyla Porifera, Cnidaria, and Ctenophora. Moumita Sen exercise https://www.khanacademy.org/science/revision-term-1-tg-zoology-class-11/x3b6649d52e708d07:week-3/x3b6649d52e708d07:animal-diversity-part-i/e/platyhelminthes-aschelminthes-and-annelida 2026-04-08T00:54:09.631945657Z Platyhelminthes, Aschelminthes, and Annelida Platyhelminthes, Aschelminthes, and Annelida Moumita Sen exercise https://www.khanacademy.org/science/biology-essentials/x35f699f4a3703d4e:untitled-50/x35f699f4a3703d4e:lower-animals/e/platyhelminthes-nematoda-annelida-arthropoda-mollusca 2026-04-08T00:16:02.937952483Z Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca This article tests the ability to distinguish between the salient features of Platyhelminthes, Nematoda, Annelida, Arthropoda, and Mollusca. Moumita Sen exercise https://www.khanacademy.org/science/revision-term-1-od-grade-9-life-science/x26da6cb4aecf5718:week-1/x26da6cb4aecf5718:diversity-in-living-organisms/e/non-chordates-i 2025-02-11T06:12:20.85923236Z Non chordates - I This exercise is about animal phyla Platyhelminthes, Nematoheleinthes, and Annelida. Nivedhitha exercise https://www.khanacademy.org/science/revision-term-1-od-grade-9-life-science/x26da6cb4aecf5718:week-1/x26da6cb4aecf5718:diversity-in-living-organisms/e/non-chordates-ii 2026-04-06T05:34:24.014119066Z Non chordates - II This exercise is about the phyla Arthropoda, Mollusca, and Echinodermata. Nivedhitha exercise https://www.khanacademy.org/science/revision-term-1-tg-zoology-class-11/x3b6649d52e708d07:week-3/x3b6649d52e708d07:animal-diversity-part-i/e/arthropoda-and-mollusca 2026-04-07T22:59:30.107127435Z Arthropoda and Mollusca Arthropoda and Mollusca Moumita Sen exercise