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Illuminating Photosynthesis Go to Illuminating Photosynthesis

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Illuminating Photosynthesis
by Rick Groleau

Photosynthesis in plants and a few bacteria is responsible for feeding nearly all life on Earth. It does this by taking energy from the sun and converting it into a storable form, usually glucose, which plants use for their own life processes. Animals that consume plants also make use of this energy, as do those that consume those that consume plants, and so on to the top of the food chain.

As important a job as making all of the world's food is, there's another vital function that photosynthesis performs: It generates the oxygen that oxygen-breathing animals need to survive. But here we animals repay the favor. We exhale the carbon dioxide that plants need for photosynthesis.

This feature takes a look at the oxygen/carbon dioxide cycle and at the process of photosynthesis. Also included are a few puzzlers with answers that may surprise you.

Flash is a plug-in that allows for increased interactivity. If you can see the animated boxes at left, the plugin is already installed. If you do not see the boxes, you can install the Flash plugin, or select this feature's non-Flash version.


Rick Groleau is managing editor of NOVA Online.




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