How ground water reaches the top of the tree helps to live?

Question

plants and its survival

Answer 1

a). water exits leaf through stomata.
b). this water loss is replaced by evaporation from mesophyll cells, lowering their water potential, causing them to take water from neighboring cells.
c). the process connects back to the tracheids causing water to be taken from the xylem.
d).Water travels from the tracheids to the air following a water potential gradient.
e). Waters cohesive and adhesive properties and the small diameter of xylem aid in its movement of up the tube.
f). This pull decreases water pressure in the xylem causing the roots to take water from the soil.

Answer 2

Transpiration - the evaporation from the leaves of the plant or tree draws water up thin hollow tubes in the stem in a continuous stream - like sucking liquid up through a drinking straw. This is aided by capillary action but capilarity would not on its own be able to drawn water to the full height of a 200ft tree.

As the water is lost at the leaves and drawn up through the stem so more is absorbed in the roots giving an unbroken stream from root to leaf.

Answer 3

Through transpiration the water moves up through the stem as water evaporates through the leaves. Only about 10% of water taken in is actually used by the plant.

Answer 4

Capillary action.