PLANT PHYSIOLOGY
TRANSPORT IN PLANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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CO2 and amino acids
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Magnesium and sucrose
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Magnesium and potassium
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CO2 and zinc
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Detailed explanation-1: -Xylem sap carries soil nutrients (e.g., dissolved minerals) from the root system to the leaves; the water is then lost through transpiration. Maple sap is xylem sap, containing some sugar in late winter. Phloem, or sieve-tube, sap is the fluid carrying sugar from leaves to other parts of the plant in the summer.
Detailed explanation-2: -The chemical components of xylem and phloem sap are as follows: Xylem sap: In xylem sap the major constituents are water and diluted concentrations of different minerals. It is slightly acidic. Phloem juice: Phloem sap consists of trace elements, water, sucrose and amino acids.
Detailed explanation-3: -Small amounts of Phosphorus and Sulphur are transported in the form of organic compounds. Some exchange of materials also takes place between xylem and phloem. So, it cannot be clearly said that xylem transports only inorganic compounds and phloem transports only organic compounds.