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Explanation:
Q. 1) POTOMETER.
Q. 2)Potometer is the apparatus used to record the rate of transpiration in a cut shoot.
Q. 3)Transpiration can be demonstrated by covering the plant with a glass jar.
Explanation: When the plant is covered with a glass jar the water transpirated through its stomata will be condensed inside the jar thereby causing formation of water droplets inside the glass jar or on the surface of the leaves.
Q. 4) a)The name of the apparatus is POTOMETER.
b)This is used to measure the uptake of water by the shoot of the plant .
c)The air bubble in the potometer moves with the uptake of water by the plant and the distance travelled by the bubble in a given time gives the rate of the transpiration .
d)The reservoir plays an important role in this apparatus as it is useful in bringing the air bubble to the start position.
E) i) In the dark room the plant transpiration is reduced as a result of which the air bubble will not move much.
ii)In the sunlight the plant transpires the most as a result of which the air bubble moves to a greater amount towards the plant.
iii)The effect of wind on the plant is that as the wind rate increases the rate of transpiration also increases ,hence the plant placed in front of the fan will show more transpiration rate thus the movement of air bubble will be more towards the plant .
Q. 5)
A) Transpiration.
B) Transpiration is a process in which the plants losses water in the form of vapour in the areal parts of the plants.
C) The plant is covered with plastic to prevent the evaporation of water from the soil.
Q. 6) A moisture meter is an essential instrument used in many industries to detect moisture content in materials.
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