The word photosynthesis means
"making with light "-plants need "energy"
from sunlight to survive. To do this they also need the
green substance chlorophyll and the raw materials: water
and carbon dioxide. Chlorophyll is found in the chloroplasts
(small round structures) of the leaf cells where most photosynthesis
takes place.
Plants obtain
1) water from the soil through roots and
2) carbon dioxide from the air through pores in their leaves.
The Chlorophyll absorbs sunlight energy and uses it to
convert carbon dioxide and water into
glucose and oxygen. All animals depend upon these products
.They use oxygen for respiration and glucose for food.
why chlorophyll looks green making all plants look green in return ?
Chlorophyll looks green because it absorbs red and blue light, hence our eyes only see green reflected back, making chlorophyll appear green. However the red and blue spectrum energy makes it produce food .The green light that we see is not absorbed by the plant, hence cannot be used for photosynthesis.
Photosynthesis starts when the chlorophyll molecule gets ionized by light resulting into release of two electrons, This leaves chlorophyll with a deficit of electrons, so it uses water (another reducing agent ) to produce the life giving oxygen.
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