Question

Upward movement of water in plants is referred to as
(A)Translocation
(B)Suction
(C)Flight
(D)Ascent of sap

Answer 1

Hint: Several factors help in the passive movement of water through the xylem to ascend to such heights of large trees. But the primary force in this capillary movement is the adhesion between water and surface of the xylem conduits.

Complete answer:
The upward movement of water from root to leaves in a plant is known as Ascent of sap.
It is carried out by xylem tissues that take water and minerals from the roots to the crown. Xylem is a complex tissue of living and non-living tissues and contains non-living conducting cells- vessel members and tracheids. The cohesion- tension mechanism is what maintains the flow of sap in the xylem tissues.

Additional Information:
Translocation is the process of delivering nutrients and other molecules over long distances by phloem tissues in the plants. It occurs within a series of cells known as the phloem pathway and the nutrients are translocated as solutes in a solution known as phloem sap. The main nutrients translocated by this process are sugars, amino acids, and minerals.
By suction force or process in plants, we mean transpiration which is a technical term for the evaporation of water from plants. The excess water that was pulled by the roots but not used in the plant's living processes are excreted out by the Stomatal pores on the leaves and evaporates in the atmosphere. As this process occurs, it creates a negative pressure called suction in the leaves and tissues of the xylem.

So, the correct answer is “Ascent of sap”.

Note: The cohesion-tension mechanism that keeps the sap flow in a continuous manner is related to the suction force acquired by transpiration. The tension created by transpiration helps the roots to absorb more water from the soil. The sap transport through xylem is a passive process i.e. It doesn't require energy usage to be powered. Their transpirational pull along with pressure flow hypothesis and root pressure helps in the upward movement of water through the xylem.