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Animals, non-green plants are directly or indirectly
depended on the organic food prepared by green cells of plants.

Green plants manufacture simple carbohydrates.
E.g. sugars in the leaves by the chloroplast in the presence
of sunlight from water and carbon dioxide absorbed from soil
and air respectively. This process of manufacturing food
material if called as photosynthesis.

Strach and Oxygen are end:-Products of photosynthesis starch
accumulates in the leaf while oxygen escapes from it.
Necessary conditions for process of photosynthesis are as
follows
(1)Light:-Formation of carbohydrates cannot take place in
the absence of light. According to intensity of light rate
of photosynthesis also varies.
(2)Carbon dioxide:-Various organic compounds have carbon as
their chief constituent. Carbon dioxide if air is the chief
source of all this carbon.
(3)Water:- Under the influence of chloroplast and in the
presence of light, water and carbon dioxide undergo chemical
reaction to from carbohydrates. In the process of
photosynthesis about 1% of water absorbed by roots is utilized.
(4)Temperature:-35oc is stated to be the optimum temperature
for the process of photosynthesis.
(5)Chlorophyll:- It is very essential for the process of
photosynthesis. Non-green plants cannot manufacture their
food material.
(6)Potassium:-In the process of photosynthesis potassium
function as a catalyst

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