Question

The upward conduction of water from roots is carried out by
A) Xylem
B) Phloem
C) Cambium
D) Bark
E) Pith

Answer 1

Hint: The conduction of water is always done by xylem tissues which are parenchymal cells (permanent tissue). These cells are connected from roots to leaves of the plant.

Complete answer:
Water transportation can be active, diffusion and facilitated diffusion. Xylem tubes are present from roots to stem to ensure transportation. The water is absorbed from roots and then enters the xylem tissues for transportation. Later they go till leaves for transpiration. Transpiration is a process with loss of water and maintains water level as only a minute amount is required for photosynthesis.
Water is transported with potential gradient through symplast and apoplast pathway. Apoplast pathway is through apoplast which are gaps between the cellulose fibers. The symplast pathway is through symplast where cytoplasm is connected by plasmodesmata.
 Xylem are made up of tracheids, vessels, xylem sclerenchyma and xylem parenchyma. The passive absorption is fast and also occurs in plants having high transpiration. Transpiration helps in water uptake and thus can be taken into account for measuring the transpiration.
The transpiration driven ascent of xylem sap depends mainly on the cohesion(mutual attraction between water molecules), adhesion (attraction of water molecules to polar surfaces)and surface tension(water molecules are attracted to each other to the liquid phase more than to water in gas phase).

Thus, the correct option is A
Note:
When evaporation is low excess of water collects in the form of droplets around special opening of veins near the tip of grass blades and leaves.This process is known as guttation(loss of water in a liquid form),