The olive plant，Olea europaea，is grown in many parts of the world．The fruits of the plant（olives） and the oil that can be obtained from the fruits（olive oil），provide food for humans． Triglycerides are the main type of lipid in olive oil．They are synthesised in the olive plant from glycerol and fatty acids． Scientists can analyse samples of different olive oils to identify： －the fatty acids used to synthesise triglycerides －the composition of the different triglycerides present． Phloem is the plant tissue responsible for the transport of organic substances, such as fatty acids, from one area of a plant to another. The tissue is composed of more than one type of cell. Name the type of cell that forms the transport vessels of phloem tissue. ......................................................................................................................................... 教

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