A student looked at the surface of a leaf using a light microscope.

The diameter of the field of view is $mm0.30\text{ mm}$ .

The student recorded the number of stomata visible in three different zones on the leaf surface using the same magnification:

Zone 1: $18$ stomata
Zone 2: $13$ stomata
Zone 3: $14$ stomata

Calculate the area of the field of view. Use the equation: $area=πr2\text{area} = \pi r^2$ , where $π=3.14\pi = 3.14$ and $r$ is the radius of the field of view.

Calculate the mean number of stomata in one field of view.

Stomatal density is the number of stomata per $mm2\text{mm}^2$ . Use your results from parts (i) and (ii) to calculate the mean stomatal density. Give your answer to 3 significant figures.

A student looked at the surface of a leaf using a light microscope.

The diameter of the field of view is $mm0.30\text{ mm}$ .

The student recorded the number of stomata visible in three different zones on the leaf surface using the same magnification:

Zone 1: $18$ stomata
Zone 2: $13$ stomata
Zone 3: $14$ stomata

Calculate the area of the field of view. Use the equation: $area=πr2\text{area} = \pi r^2$ , where $π=3.14\pi = 3.14$ and $r$ is the radius of the field of view.

Calculate the mean number of stomata in one field of view.

Stomatal density is the number of stomata per $mm2\text{mm}^2$ . Use your results from parts (i) and (ii) to calculate the mean stomatal density. Give your answer to 3 significant figures.

2.1 Supplying the cell

Question 21

Markscheme

2.1 Supplying the cell

Question 21

Markscheme

2.1 Supplying the cell

Question 21

2.1 Supplying the cell Questions

2.1 Supplying the cell

Question 21

2.1 Supplying the cell Questions