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a) Plotting
Scale
Axis labelling
Identify curves
b)Rate
Still; 1.4 per m2 per hour;
Wind ; 6.0 per m2 per hour
( c) As width of the stomata increases the rate of transpiration increase;
Increase in the width of the stomata increases the surface area over which water loss by transpiration occurs; hence increasing the rate of transpiration
d) In still air the water vapour lost from the plant accumulates in the air surrounding the leaf; thus increasing humidity; which reduces saturation deficit between leaf cells and the atmosphere hence reducing transpiration rates,
In wind; the water vapour being from the plant(shoot) is carried away from the surrounding of the plant; increasing the saturation deficit between leaf cells and the surrounding air; thus reduce rates of transpiration;
(e) -Evaporation of water from the leaf surface causes cooling of the plant:
-Facilitates loss of excess water from the plant excretion;
-Concentrates mineral salts around the roots facilitating their easy, uptake by diffusion;
-Facilitates turgidity of plant cells hence support in herbaceous plants;
marto answered the question on October 9, 2019 at 08:00
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(a) Name the structures A and B .
A
B
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(ii) Explain other methods by which the skin helps to keep the body warm.
Date posted: October 9, 2019. Answers (1)
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a)name the structures labeled P, Q, S and T. For each of the structures, state one function.
b)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 8, 2019. Answers (1)
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Date posted: October 7, 2019. Answers (1)
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Date posted: October 7, 2019. Answers (1)
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Date posted: October 7, 2019. Answers (1)
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Date posted: October 7, 2019. Answers (1)