Previous year MCQs

General science UPPSC 2015 GS-I
Question

The 'xylem' in plants is responsible mainly for:

Answer & Solution

Answer: (Detailed Solution Below)

Option C: Transportation of water

Detailed Solution:

The correct answer is “Transportation of water”.
The xylem in plants is responsible for the transportation of water and minerals from the roots to the other parts of the plant, including the stems, leaves, and flowers.

The movement of water in xylem occurs through a process called transpiration. Transpiration is the loss of water vapor from the aerial parts of the plant, primarily through tiny pores called stomata on the leaves.

As water evaporates from the stomata, it creates a negative pressure that pulls water molecules from the xylem vessels in the leaves down to the roots.

In addition to water transport, the xylem also provides structural support to the plant.

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