LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water vapor leaves the leaf through the stomata.
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Water is taken up by the roots from the soil.
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Water travels in the stem through the leaf.
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Sugar is moved throughout the plant.
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Detailed explanation-1: -1-Water is passively transported into the roots and then into the xylem. 2-The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. 3-Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.
Detailed explanation-2: -Water moves up the xylem by a process called capillary action. Water molecules like to stick. together. In capillary action, water is pulled up through the tubes because very tiny components. of water, called molecules, are attracted to the molecules that make up the tube.
Detailed explanation-3: -Roots absorb water from the soil. This water travels up to the stem and then to the branches. Finally water is distributed to every leaf via petiole. Petiole is the part of leaf which connects it to the plant.
Detailed explanation-4: -Transpiration is a process that involves loss of water vapour through the stomata of plants. The loss of water vapour from the plant cools the plant down when the weather is very hot, and water from the stem and roots moves upwards or is ‘pulled’ into the leaves.