What is one way this diagram could be adjusted to model how energy is conserved in living systems? Include the Sun giving energy to plants.
Replace the title "The Carbon Cycle" with a new title "The Energy Cycle".
O Only include the processes of photosynthesis and cellular respiration.
Remove the non-living parts of the diagram.

The chemical composition of soil varies with depth. an article in communications in soil science and plant analysis describes chemical analyses of soil taken from a farm in western australia. fifty specimens were each taken at depths 50 and 250 cm. at a depth of 50 cm, the average no3 concentration (in mg/l) was 88.5 with a standard deviation of 49.4. at a depth of 250 cm, the average concentration was 110.6 with a standard deviation of 51.5. find a 95% confidence interval for the difference in no3 concentrations at the two depths.