The tissue of highest respiratory activity is

Options

A. Meristems
B. Ground tissue
C. Phloem
D. Mechanical tissue

Answer

**Step-by-Step Solution:**

1. **Understanding Plant Tissues:**
- Identify the types of plant tissues mentioned in the question: meristems, ground tissue, phloem, and mechanical tissue.
- Recognize that these tissues have different functions and metabolic activities.

2. **Metabolic Activity in Plants:**
- Understand that plants generally have a low metabolic activity compared to animals due to their stationary life.
- Acknowledge that most plant tissues are made up of dead cells, especially in woody parts.

3. **Identifying the Tissue with Highest Respiratory Activity:**
- Among the listed tissues, meristematic tissue is unique because it consists of actively dividing cells.
- Meristems are located at the tips of roots and shoots, where growth occurs.

4. **Conclusion:**
- Since meristematic tissue is actively dividing, it requires more energy and thus has the highest respiratory activity among the plant tissues.
- Therefore, the correct answer to the question is **meristems**.

---