After posting my argument I found this piece of information on the web:


Water and CO2

Plants need water for photosynthesis. If they lack it, they wilt. When they have a deficiency of water, their stomata close, so CO2 cannot diffuse into the leaves. So CO2 is also the limiting factor, although it is as a result of lack of water.

http://library.thinkquest.org/22016/photo/rate.html

Rice kiasu:

Hi,science paper bklt A Q5. rate of photosynthesis is reduced bcause lack of ___.

Is it carbon dioxide or water?My Ds put water.

I am trying my \"mathematical\" reasoning here:

In the presence of light,

carbon dioxide + water ---> oxygen (product of photosynthesis)

CO2 + H2O ---> oxygen

From above 2 molecules of oxygen is found in \"carbon dioxide\" while only 1 molecule of oxygen is found in \"water\".

Hence \"carbon dioxide\" is deemed more important in the determining the rate of photosynthesis.

:siao: