Summary
Translocation is the movement of food substances from leaves to other parts of the plant.
- Translocation — the process of transporting food substances in plants. Example: Movement of sugars from leaves to roots.
- Phloem — the tissue responsible for translocation in plants. Example: Phloem tubes carry sugars and other nutrients.
- Source — the part of the plant where substances are produced. Example: Leaves act as a source during photosynthesis.
- Sink — the part of the plant where substances are used or stored. Example: Roots can be a sink for sugars.
Exam Tips
Key Definitions to Remember
- Translocation: the movement of food substances in plants.
- Phloem: tissue responsible for transporting nutrients.
- Source: part of the plant where substances are produced.
- Sink: part of the plant where substances are used or stored.
Common Confusions
- Confusing phloem with xylem, which transports water, not food.
- Thinking translocation only occurs in one direction.
Typical Exam Questions
- What is translocation? The movement of food substances from leaves to other parts of the plant.
- How does phloem differ from xylem? Phloem transports nutrients, while xylem transports water.
- What is the role of a source in a plant? It is where substances are produced, like leaves during photosynthesis.
What Examiners Usually Test
- Understanding the function of phloem in translocation.
- Differentiating between source and sink in plants.
- Explaining the direction and purpose of translocation.
