No, guard cells are not prokaryotic. They are eukaryotic cells found in plants.
Guard cells are specialized cells located in the epidermis of leaves, stems, and other plant organs. They surround stomata, which are pores that regulate gas exchange between the plant and the atmosphere. Prokaryotic cells, like bacteria and archaea, are simpler cells lacking a nucleus and other membrane-bound organelles. In contrast, eukaryotic cells, including plant cells like guard cells, possess a nucleus and other complex organelles. The provided text incorrectly states that guard cells are prokaryotic.
Here's a comparison highlighting the key differences:
| Feature | Prokaryotic Cell | Eukaryotic Cell (e.g., Guard Cell) |
|---|---|---|
| Nucleus | Absent | Present |
| Organelles | Absent or few | Present (e.g., mitochondria, chloroplasts, endoplasmic reticulum) |
| Cell Size | Smaller (0.1-5 µm) | Larger (10-100 µm) |
| Examples | Bacteria, Archaea | Plants, Animals, Fungi, Protists |
Guard cells, as plant cells, contain organelles such as chloroplasts (for photosynthesis), mitochondria (for energy production), and a nucleus (containing the genetic material). These features clearly classify them as eukaryotic, not prokaryotic.
