Diffusion is important for plants as it is the only means for movement of .............. within the plant body.

Options

A. Gases
B. Organic Nutrients
C. Minerals
D. Water

Answer

**Step-by-Step Solution:**

1. **Understanding Diffusion**: Diffusion is a process where molecules move from an area of higher concentration to an area of lower concentration. This movement occurs until there is an equal concentration of molecules in both areas.

2. **Importance of Diffusion in Plants**: In plants, diffusion is crucial for the movement of various substances. It allows for the exchange of gases, such as oxygen and carbon dioxide, which are essential for photosynthesis and respiration.

3. **Movement of Gases**: Among the various substances that diffuse within plants, gases play a significant role. The primary gases involved are carbon dioxide (CO2) and oxygen (O2). Carbon dioxide enters the plant through stomata for photosynthesis, while oxygen produced during photosynthesis diffuses out.

4. **Conclusion**: Therefore, the statement can be completed as follows: "Diffusion is important for plants as it is the only means for the movement of gases within the plant body."

**Final Answer**: Gases

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