Plant transport Flashcards
2 structural differences of Xylem and Phloem
Phloem contains companion cells
Xylem has lignin
Xylem has pits
Phloem has sieve plates
Tissue that transports water in roots
Xylem
How xylem is adapted to transporting water
Continuous/narrow tube
contains pits
lignin
Cohesion tension model
Water evaporates from leaf due to transpiration
causes tension to pull water up as well as root pressure pushing it upwards
While flowing cohesion cause water molecule to be attracted to each other
adhesion causes water molecules to be attracted to the walls of the xylem
water can as a result travel up to the shoots
Why stomata on bottom of leaf
Reduces water lost to transpiration
Why stomata on bottom of leaf
Reduces water lost to transpiration
Disadvantage of high transpiration rate
Wilting
How water enters through root hairs and passes to vascular tissue
absorbed by root hairs due to osmosis
