The diagram shows cells that are important in the process of water absorption in plants.
The width of cell Y (including its extension) in a diagram is measured to be 30 mm. This image of the cell has been magnified 150×150\times150×.Calculate the actual width of cell Y.Use the equation: actual width=measured size÷magnification\text{actual width} = \text{measured size} \div \text{magnification}actual width=measured size÷magnification.Width = ……………………………………………… mm\text{……………………………………………… mm}……………………………………………… mm
What is the name of plant cell Y? Tick one box:
- Phloem cell
- Root hair cell
- Xylem cell
State two ways that cell Y is adapted to its function in a plant.
Light microscopes let us see objects as small as 0.2 μm0.2\,\mu\text{m}0.2μm. The width of cells similar to cell Y can vary between 0.015 mm and 0.12 mm. (1 mm=1000 μm1\text{ mm} = 1000\,\mu\text{m}1 mm=1000μm) Is it possible to see all these types of cells using a light microscope? Explain your answer.
State why electron microscopy has increased our knowledge of sub-cellular structures.