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transpiration means loss of water from stomata .
function - Help in regulation of water in plants.
also result in gases exchange ( This is very interesting point think about it ) .
phloem is used to transport food
it move food ib both directions
sieve tubes helps in this process.
xylem is used to transport water
it moves in upward direction
here vessel tube help in transportation.
ozone is molecule of O3
help in preventing rays from entering earth atmosphere.
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