Review A-Level Edexcel Biology tables, diagrams and charts through interpreting biological relationships, trends, conclusions and supporting data.
Light is essential for photosynthesis.
The photograph shows thale cress, a small flowering plant found in Europe, Asia and Africa.
The effect of wavelength of light on thale cress was investigated. Three groups of plants were treated with a different wavelength of light. One group of plants was treated with blue light, one group with amber light and one group with red light. The following were measured: - rate of photosynthesis - leaf biomass - pigment content of the leaves - changes in transcription of genes in the leaves. Another group of these plants had a control light shone on them.
The table shows the results for the pigment content of the leaves.
Describe three conclusions that can be made from these results.