Video Transcript
The diagram given shows the process
of transpiration in a plant. By what process do the plant roots
absorb water from the soil?
Transpiration is the evaporation of
water from the plant tissues. Due to transpiration, water moves
upward through the plant from the roots toward the leaves. As the water leaves the roots to
move upward, the concentration of water in the roots decreases. This transport of water out of the
root and the active transportation of soil minerals into the roots causes the water
concentration in the vacuoles of the root cells to be lower than in the surrounding
soil. When the concentration of water is
lower in the roots than in the surrounding soil, water will naturally move into the
roots.
This natural movement of water from
an area of higher concentration, the soil, into an area of lower concentration, the
root, is called osmosis. So the answer to this question is
osmosis. Plant roots absorb water from the
soil through osmosis.
