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In plants water, minerals and food are g...

In plants water, minerals and food are generally moved by a

A

mass or bulk flow system

B

diffusion

C

osmosis

D

active transport

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Components:** - In plants, the movement of water, minerals, and food is essential for their growth and survival. These components are transported through specialized tissues. 2. **Identifying the Transport Mechanisms:** - There are several mechanisms by which substances can move within plants: diffusion, osmosis, active transport, and mass or bulk flow. 3. **Analyzing Each Option:** - **Diffusion:** This is the movement of molecules from an area of higher concentration to an area of lower concentration. While it does play a role in the movement of some substances, it is not the primary mechanism for transporting large volumes of water and nutrients. - **Osmosis:** This is a specific type of diffusion that refers to the movement of water across a semi-permeable membrane. It is crucial for water movement but does not account for the transport of minerals and food. - **Active Transport:** This process requires energy to move substances against their concentration gradient. It is important for the uptake of certain minerals but is not the main method for bulk transport. - **Mass or Bulk Flow:** This is the movement of substances in large quantities from one part of the plant to another, typically driven by pressure differences (such as in the xylem and phloem). It is the primary mechanism for transporting water, minerals, and food throughout the plant. 4. **Conclusion:** - Based on the analysis, the correct answer is that in plants, water, minerals, and food are generally moved by a **mass or bulk flow system**. **Final Answer: Mass or Bulk Flow System** ---
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Which of the following statements is/are incorrect? (i) Water and minerals, and food are generally moved by a mass or bulk flow system. (ii) Bulk flow can be achieved either through a positive hydrostatic pressure gradient or a negative hydrostatic pressure gradient. (iii) The bulk movement of substances through the conducting tissues of plants is called translocation. (iv) Xylem translocates organic and inorganic solutes, mainly from roots to the aerial parts of the plants. (v) Phloem translocates water, mineral salts, some organic nitrogen and hormones, from the leaves to other parts of the plants.

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