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Multiple Choice
Which of the following substances are primarily transported upward during translocation in plants?
A
Sucrose and amino acids
B
Water and mineral ions
C
Oxygen and carbon dioxide
D
Starch and cellulose
Verified step by step guidance
1
Understand the concept of translocation in plants: Translocation refers to the movement of substances within the plant, typically through the vascular tissues (xylem and phloem). The direction of transport depends on the type of substance being moved.
Identify the role of xylem in upward transport: The xylem is responsible for transporting water and dissolved mineral ions from the roots to the leaves and other parts of the plant. This process is driven by transpiration and root pressure.
Differentiate between substances transported by xylem and phloem: Xylem primarily transports water and mineral ions upward, while phloem transports organic compounds like sucrose and amino acids bidirectionally (upward and downward).
Analyze the options provided: Evaluate each option to determine which substances are primarily transported upward during translocation. Water and mineral ions are the correct answer because they are moved upward through the xylem.
Conclude the reasoning: Based on the understanding of plant vascular systems, water and mineral ions are the substances primarily transported upward during translocation in plants.