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KS update 1.3
File:Brown rice.jpg|The food we eat comes directly or indirectly from plants such as rice.
File:Brown rice.jpg|The food we eat comes directly or indirectly from plants such as rice.
File:Chromatography.jpg|Example of paper chromatography of chlorophyll (extracted by spinach leaves) with organic solvent
File:Chromatography rev.jpg|[[Paper chromatography]] of some [[spinach]] leaf extract shows the various pigments present in their chloroplasts: yellowish xanthophylls, greenish chlorophylls ''a'' and ''b''.
File:Medicago italica root nodules 2.JPG|The [[root nodule|nodules]] of ''[[Medicago italica]]'' contain the [[nitrogen fixation|nitrogen fixing]] bacterium ''[[Sinorhizobium meliloti]]''. The plant provides the bacteria with nutrients and an [[hypoxia (environmental)|anaerobic]] environment, and the bacteria [[nitrogen fixation|fix nitrogen]] for the plant.{{sfn|Campbell|Reece|Urry|Cain|2008|p=794}}
File:Medicago italica root nodules 2.JPG|The [[root nodule|nodules]] of ''[[Medicago italica]]'' contain the [[nitrogen fixation|nitrogen fixing]] bacterium ''[[Sinorhizobium meliloti]]''. The plant provides the bacteria with nutrients and an [[hypoxia (environmental)|anaerobic]] environment, and the bacteria [[nitrogen fixation|fix nitrogen]] for the plant.{{sfn|Campbell|Reece|Urry|Cain|2008|p=794}}