Identify the plants that use the total body surface for respiration purpose.

Options

A. Chlamydomonas
B. Spirogyra
C. Mangrove trees
D. Both (a) and (b)

Answer

To identify the plants that use the total body surface for respiration, we can follow these steps:

1. **Understand the Concept of Respiration in Plants**: Respiration in plants involves the exchange of gases (oxygen and carbon dioxide) necessary for metabolic processes. Some plants can perform this through their entire body surface.

2. **Analyze the Given Options**: The options provided are:
- A) Clamido monas
- B) Pyrogaira
- C) Mangrove trees
- D) Both A and B

3. **Evaluate Each Option**:
- **Clamido monas**: This is a type of green algae that can perform respiration through its body surface.
- **Pyrogaira**: This is another type of green algae that also utilizes its entire body surface for respiration.
- **Mangrove Trees**: These trees have specialized structures called pneumatophores, which are root adaptations that help in gas exchange. Therefore, they do not rely solely on their body surface for respiration.
- **Both A and B**: Since both Clamido monas and Pyrogaira utilize their entire body surface for respiration, this option is valid.

4. **Conclusion**: The correct answer is option D, which states that both Clamido monas and Pyrogaira use their total body surface for respiration.