3. Give suitable explanation for the following:
(a) A higher rate of transpiration is recorded on a
windy day rather than on a calm day.
(b) Excessive transpiration results in the wilting of the
leaves.
(c) Some plants show wilting of their leaves at noon
even when the soil is well-watered.
(d) More transpiration occurs from the lower surface
of a dorsiventral leaf.
(e) The stomata in most plants are more numerous on
the lower surface of a leaf as compared to the
upper surface.
(f) Forests tend to bring more rains.
(g) On a bright sunny day, the leaves of certain plants
roll up
Answers
Answer:
a.it is becoz on a windy day the water molecules around the surface of the leaf are moved away so to maintain a particular amount of moisture rate increases.
b.it is because a lot of water is lost.
c.at noon time the rate of transpiration will be high.so a lot of water is lost resulting in wilting.
d.it is because the lower surface have more stomata(opening through which transpiration occur).
e.it is a characteristic feature of dicots to prevent excess water loss.
f.it is because the atmosphere around forests is rich in water bapour which condenses immediately and resulting in more rain.
g.it is a characteristic feature of monocot due to the prescwnce of bulliform cells which makes the leaf curl during water stres to avoid excess water loss.
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