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Auxins are a group of hormones that are only present in plants. They are

mostly present in the tips of the stems and roots. The auxins help certain

grow more and faster.


The Auxins present in the stems help it grow faster, the auxins present in the

roots causes a decrease in growth rate.


If a plant was growing the side that is not facing the sun will have more auxin

and therefore grow more causing it to bend towards the sun. This is

highlighted in the picture.




In roots the Auxins causes less growth upwards and causes it to bend down

in the direction of gravity therefore the roots can get further into the ground.


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The Menstrual Cycle                         Control in Plants