In photosynthesis, carbon dioxide is taked from the air by the leaves and
combined with water absorbed by the roots to form organic molecules.
Then, the products of photosynthesis, glucose and oxygen, are combined and
the oxygen is used to oxidize the glucose in the plant's respiration back
into water and carbon dioxide with energy released. This energy is then
used to synthesize and maintain stuff in the plant.
Hope this helps. =Þ
Kirk Newman wrote in message <6cvhdr$d5s2 at theusc.csd.sc.edu>...
>I always thought plants used carbondioxide
>and released oxygen. Recently, I was told
>they also use oxygen. If the statement is true,
>what do they use oxygen for?