The electron micrograph of a leaf section shown here has a magnification of $\times 210$. See image. What is the true length along the line X-Y?
- A$2.43\,\mu\text{m}$
- B$24.3\,\mu\text{m}$
- C$243.0\,\mu\text{m}$
- D$2430\,\mu\text{m}$
Biology 9700 · AS & A Level · The microscope in cell studies