Which feature of xylem vessel elements allows them to stay open as transpiration increases?
1 )
new vessel elements carry extra water as a plant grows
2 )
there are no cross walls between vessel elements
3 )
vessel elements form narrow tubes
walls of vessel elements contain lignin
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!