https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:transport-in-flowering-plants/x2a084a90105205d2:uptake-and-transport-of-water-and-ions/v/activity-xylem-ur 2025-08-07T23:35:51.501752344Z Activity: Xylem Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Activity: Xylem Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/8kMeEK8ANYc.mp4/8kMeEK8ANYc.mp4 140 Uptake and transport of water and ions https://www.khanacademy.org/science/cambridge-o-level-biology-cie/x2a084a90105205d2:transport-in-flowering-plants/x2a084a90105205d2:uptake-and-transport-of-water-and-ions/e/how-to-plants-absorb-water 2026-04-21T09:50:34.424034119Z How to Plants Absorb Water? This exercise explains how roots absorb water, highlighting the roles of root hairs, apoplast–symplast pathways, and the endodermis. Students interpret scenarios showing why seedlings wilt after losing root hairs, how compacted soil slows diffusion, why dyes stop at the Casparian strip, and how selective uptake into the xylem works. It also shows how mycorrhizae greatly enhance water absorption in young or drought-stressed plants. Khan Academy exercise