https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-4/x00110b31861f2508:living-creatures-exploring-their-characteristics/e/in-in-tropism-in-plants 2026-03-05T08:50:45.400692349Z Tropism in plants This exercise provides practice for tropism in plants and its types. saiyem exercise https://www.khanacademy.org/science/biology/plant-biology/plant-responses-to-light-cues/v/phototropism 2021-03-18T10:33:23Z Phototropism Phototropism and the role that auxin plays. video https://cdn.kastatic.org/googleusercontent/Jbm1F9-yrQqHf_9BompUER2O4dzbnAMd9rvoe5xQ8HAqXH0Zx2_hiJYOH0JicYx5tjpvev-0Nd69qzJMtdMMOuZj Phototropism Phototropism and the role that auxin plays. https://cdn.kastatic.org/ka-youtube-converted/2A_LKrLlhxE.mp4/2A_LKrLlhxE.mp4 415 Plant movements and environmental responses https://www.khanacademy.org/science/biology/plant-biology/plant-responses-to-light-cues/v/photoperiodism 2021-03-23T22:19:10Z Photoperiodism How plants can regulate processes like flowering based on day length (photoperiod). video https://cdn.kastatic.org/googleusercontent/VygHoElR533-C9DE4RLKSkFWa6cPqsxLGAiYGkWWMnWIX1wAL2ER8ubwH7MFOe5v5r5r-qpm_3_yv3D7SnfD5L4c Photoperiodism How plants can regulate processes like flowering based on day length (photoperiod). https://cdn.kastatic.org/ka-youtube-converted/AQf3gKTCffs.mp4/AQf3gKTCffs.mp4 476 Plant movements and environmental responses https://www.khanacademy.org/science/up-biology-grade-11-revision-course-full-term/x01ceb15d0be61009:week-1/x01ceb15d0be61009:untitled-578/e/photoperiodism-vernalization-and-seed-dormancy 2026-01-01T06:31:39.622886371Z Photoperiodism, vernalization, and seed dormancy This exercise tests your understanding of photoperiodism, vernalization, and seed dormancy. Moumita Sen exercise https://www.khanacademy.org/science/biology/plant-biology/plant-responses-to-light-cues/a/phototropism-photoperiodism 2021-04-29T07:52:34Z Phototropism & photoperiodism Phototropism, plant growth towards or away from light, and photoperiodism, regulation of flowering and other developmental transitions by day/night length. article