Q. 15

Plants absorb water from the soil. How does this water reach to the top of the tree? Explain in detail.

Answer :

i. The soil is the richest source of raw materials for the plant like nitrogen, phosphorous, water and other minerals. Water is essential for all physiological activities of the plant. The absorption of all these substances occurs through a part of the plant called roots.


ii. The plant transport system moves raw materials from roots and energy from leaves. This is done by two independent conducting tubes called xylem which transports water and minerals from the soil and phloem transports the food from leaves to other parts of plants. vessels tracheids of xylem tissue, stem, leaves, and roots form a continuous water conducting channel reaching to all parts of the plant.


iii. The difference of concentration of ions in roots and soil, help water to enter roots from the soil to eliminate this difference (caused by root cells take up ions from soil). This maintains the steady movement of water upwards via roots.


iv. But this pressure is not enough to supply water to heights.


v. Water lost through leaves (or any aerial part of the plant) called transpiration causes a suction which pulls water from xylem cells of roots. Thus, transpiration helps in the absorption and upward movement of water and minerals from soil via roots and reach the top. Also, it helps to regulate the temperature of the plant.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Champ Quiz | Examining the Life Processes43 mins
Defining Life and Life Processes57 mins
Autotrophic Nutrition59 mins
Pumping of Blood43 mins
Transportation in Plants & Animals38 mins
Genius Quiz | Heartless Plant49 mins
Working of Heart49 mins
Champ Quiz | Double Circulation33 mins
Quiz | PISA Practice48 mins
From single cell to baby45 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses