1. From the following list, pick out the parts
through which the water vapour of
transpiration leaves the leaf and rearrange
them in proper sequence.
Xylem vessels, mesophyll cells, stoma,
intercellular space and substomatal space.
2. Does diffusion play a role in the passage of
water vapour from the leaf during
transpiration? If so, how ?
3. In any experiment to demonstrate transpiration,
the leaf must remain attached to its parent
plant. Why is this so?
4. Out of the three kinds of transpiration, which
one is maximum and which one is minimum?
(i) Maximum
(ii) Minimum ....
Answers
Answer:
1. in the proper sequence Stoma mesophyll cell xylem substomatal space intracellular space
stoma found bottom of the plant leaf
mesophyll cell are found in the centre of leaf
xylem is a vascular tube which carried the water and nutrient from the root of the plant
substomatal space are located in the proximal to the Stoma
the space between two plant cell is known as intracellular space
2. During transpiration, diffusion of water vapors from intercellular spaces (present in mesophyll cells) to the atmosphere occurs through stomata. Low water potential is generated in surrounding atmosphere of leaves due to transpiration.
3. A leaf must be attached to the parent plant at all times to show transpiration, because as soon as a leaf is detached from the plant it will be cut off from hormones and minerals. The result of this is that senescence (and death) sets in straight away.
4. Maximum transpiration occurs through stomata.So stomatal transpiration is maximum. And minimum transpiration occurs through cuticles of the plants so cuticular transpiration is the minimum one.