Figure 1 shows how the leaves are arranged on a plant.
Figure 1
Which reason explains why the leaves are arranged in this way?
☐ | A | the upper leaves allow more light to reach the lower leaves | |
☐ | B | the leaves do not need stomata | |
☐ | C | the phloem in the leaves will absorb more water | |
☐ | D | more insects will be attracted to the plant to eat the leaves |
Figure 2 shows guard cells and stomata on the lower surface of a leaf.
A ruler has been overlayed on the image for scale purposes.
Figure 2
Use the ruler overlay to measure the length of the line on the labelled guard cell in mm.
The actual length of the labelled guard cell is 0.05 mm.
Calculate the magnification of this image.
Figure 3 shows the number of stomata per mm2 on the lower surface of leaves from plants growing in soils with different water content.
Figure 3
Explain the difference in the number of stomata per mm2 on the leaves of the plants grown in dry and wet soils.
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