The diagram displays a xylem vessel in a plant stem. The magnification is $\times 400$. What is the real width of the xylem vessel measured along the line XY?
- A$8.75\,\mu\text{m}$
- B$14\,\mu\text{m}$
- C$87.5\,\mu\text{m}$
- D$140\,\mu\text{m}$
Biology 0610 · IGCSE · Size of specimens