Figure 8 shows a root hair viewed using a microscope - AQA - GCSE Biology Combined Science - Question 5 - 2019 - Paper 1

To calculate the real length of the root hair, we can use the magnification formula:

ext{Real Length} = rac{ ext{Image Length}}{ ext{Magnification}}

Given:

• Image Length (X–Y) = 43 mm
• Magnification = 50

Substituting the values:

ext{Real Length} = rac{43 ext{ mm}}{50} = 0.86 ext{ mm}

Since 1 mm is equal to 1000 μm:

$$ext{Real Length} = 0.86 ext{ mm} imes 1000 = 860 ext{ μm}$$

Thus, the real length of the root hair is 860 μm.