which is a mode of long distance transfer

Options

A. diffusion
B. cytoplasmic streaming
C. active transport.
D. translocation

Answer

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks for a mode of long-distance transfer in flowering plants. In plants, various substances such as water, minerals, nutrients, organic matter, and plant growth regulators need to be transported.

2. **Transport Over Short Distances**: For short distances, substances are transported primarily by diffusion and cytoplasmic streaming. Active transport may also supplement these processes.

3. **Transport Over Long Distances**: For long-distance transport, plants utilize their vascular system, which consists of xylem and phloem.

4. **Definition of Translocation**: The process of moving substances over long distances through the vascular system is known as translocation. This process is essential for the efficient transport of nutrients and other substances throughout the plant.

5. **Identifying the Correct Option**: Given the context of the question and the explanation provided, the correct answer to the question "which is a mode of long-distance transfer" is translocation.

**Final Answer**: The mode of long-distance transfer in flowering plants is **translocation**.

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