Page 98 - Science Class 07

proves that plants carry on transpira on
and water is lost from the plants in this
process. 1. What caused the water droplets to
collect on the inner surface of the jar?
2. Where do these water droplets come
from?

3. Since the soil has been covered
completely, the water comes from
nowhere else, but the leaves. What does
this ac vity show?

Transportation : The process of sending and carrying materials
Diffusion : Movement of molecules from the regions of greater concentration to the
regions of lesser concentration

Osmosis : Movement of water molecules from a region of lower concentration to a
region of higher concentration through the semi-permeable membrane
Imbibition : Absorption of water by both living and dead tissues of the plants when
soaked in water
Xylem : Tubes in plants that carry water and minerals from the roots to the leaves of
the plants

Phloem : Tubes in plants through which prepared food is sent to different parts of the
plants
Transpiration : Process through which plants lose water through their leaves
Wilting : The symptom of decay

Let's R
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Let's Revise evise Let's Revise evise evise Let's Revise evise
i Plants have well-developed network of tubes present everywhere in plant’s body.
i Transportation in plants is carried on by two different types of tube network called xylem
and phloem.
i Root hair of plants absorb water and minerals from the soil through a combination of
diffusion and osmosis.
i Water entering root hair gradually flows further into the root from cell-to-cell and eventually
reaches the root xylem vessels.

98 Science-7