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Junior Cert: Photosynthesis and Plant Response

Nice introduction to Photosynthesis Link 1 minute video from howstuffworks.com 4 Star
Photosynthesis and Respiration Link

Irish-made video. 10 minutes
How important are photosynthesis and respiration in plants? Well, very important it turns out. Find out exactly how roots, shoots and leaves play specific roles in these vital plant processes.

 
The oxygen-carbon dioxide cycle in Respiration and Photosynthesis Link 1 min video from howstuffworks 4 Star