The photomicrograph displays onion cells. The true length of the onion cell marked Y is $350\,\mu\text{m}$. What magnification does the photomicrograph have?
- A$\times 2.5$
- B$\times 25$
- C$\times 40$
- D$\times 400$
Biology 9700 · AS & A Level · The microscope in cell studies