Gases in plants can be transported by means of

Options

A. Ascent of sap
B. Facilitated diffusion
C. Simple diffusion
D. both b and c

Answer

To solve the question regarding how gases are transported in plants, we will analyze the options provided and determine the correct mechanism.

### Step-by-Step Solution:

1. **Understanding the Options**: The question provides several options for how gases can be transported in plants. The options include:
- Ascent of sap
- Facilitated diffusion
- Simple diffusion

2. **Analyzing Ascent of Sap**:
- The ascent of sap primarily refers to the movement of water and minerals from the roots to the rest of the plant through the xylem.
- This process does not involve the transport of gases, so this option is not correct.

3. **Analyzing Facilitated Diffusion**:
- Facilitated diffusion is a process that allows specific molecules to cross membranes with the help of transport proteins.
- While this process is important for transporting certain solutes, it is not typically involved in the transport of gases like oxygen (O2) and carbon dioxide (CO2) in plants. Therefore, this option is also not correct.

4. **Analyzing Simple Diffusion**:
- Simple diffusion is the process by which gases move across cell membranes without the need for energy or transport proteins.
- In plants, gases such as CO2 and O2 can freely diffuse in and out of cells through the stomata and cell membranes. This process allows for the exchange of gases necessary for photosynthesis and respiration.

5. **Conclusion**:
- Based on the analysis, the correct mechanism for the transport of gases in plants is **Simple Diffusion**.

### Final Answer:
Gases in plants can be transported by means of **Simple Diffusion**.

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