8 Transport in Plants1 Xylem and Phloem1. State the functions of xylem and phloem:▪ Xylem – transport of water and mineral ions, and support.▪ Phloem – transport of sucrose and amino acids.2. Identify in diagrams and images the position of xylem and phloem as seen in sections of roots, stems, and leaves of non-woody dicotyledonous plants.2 Water Uptake1. Identify in diagrams and images root hair cells and state their functions.2. State that the large surface area of root hairs increases the uptake of water and mineral ions.3. Outline the pathway taken by water through the root, stem, and leaf as: root hair cells, root cortex cells, xylem, mesophyll cells.4. Investigate, using a suitable stain, the pathway of water through the above-ground parts of a plant.3 Transpiration1. Describe transpiration as the loss of water vapour from leaves.2. State that water evaporates from the surfaces of the mesophyll cells into the air spaces and then diffuses out of the leaves through the stomata as water vapour.3. Explain how water vapour loss is related to: the large internal surface area provided by the interconnecting air spaces between mesophyll cells and the size and number of stomata.4. Explain the mechanism by which water moves upwards in the xylem in terms of a transpiration pull that draws up a column of water molecules, held together by forces of attraction between water molecules.5. Explain the effects on the rate of transpiration of varying the following factors: temperature, wind speed, and humidity.6. Explain how and why wilting occurs.Translocation1. Describe translocation as the movement of sucrose and amino acids in phloem from sources to sinks.2. Describe:▪ Sources as the parts of plants that release sucrose or amino acids.▪ Sinks as the parts of plants that use or store sucrose or amino acids.3. Explain why some parts of a plant may act as a source and a sink at different times.