8.3. Transpiration
A subsection of Biology, 0610, through 8. Transport in plants
Listing 10 of 250 questions
Complete the definition of the term transpiration. Transpiration is the loss of water vapour from plant leaves by of water at the surfaces of the cells followed by diffusion of water vapour through the . is a graph showing how temperature affects water loss in a plant with many leaves. water loss temperature Half of the leaves were removed from the plant. Predict the effect on water loss in this plant and sketch a line on to show your prediction. Describe the effect of humidity on the rate of transpiration. Water is an important substance for plants. Describe two uses of water in plants. State the name of the vessels that transport water in plants. State the name of the cells where water enters a plant.
0610_m20_qp_32
THEORY
2020
Paper 3, Variant 2
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A student investigated the rate of water loss from leaves at two different temperatures. The student measured the mass of one leaf at the same time every day for seven days. The leaf was kept at 15 °C. The student repeated this with a similar-sized leaf kept at 25 °C. shows some of the apparatus used. The results are shown in . 0.0 day mass of the leaf / g 0.2 0.4 0.6 1.2 1.4 1.6 0.8 1.0 Key: 15 °C 25 °C Describe the results shown in . Complete the sentences to explain the process shown by the results in . Water evaporates from the surfaces of the cells in the leaf. The water evaporates into the spaces. Water vapour moves out of the leaf through the by diffusion. This process is called . State the name of the vessels that transport water to the leaves from the roots. is a photomicrograph of the lower surface of a leaf. X State the name of the cell labelled X in . Identify one structure that identifies the cells in as plant cells. Explain why leaves usually have a large surface area.
0610_m23_qp_32
THEORY
2023
Paper 3, Variant 2
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Questions Discovered
250