(ii) Calculate the percentage increase in the rate of photosynthesis at a light
intensity of 1250 arbitrary units when the carbon dioxide concentration was
increased from 140 ppm to 1000 ppm.
Show your working and give your answer to the nearest whole number.

Amarine ecologist has constructed the conceptual model shown in the diagram. what predictions can be made from using this model? where the tertiary consumers get their energy how often primary producers are able to reproduce when bacteria and fungi initiate the process of decomposition whether other secondary consumers are present