Name the hormone synthesized at the shoot tips. How does it help the plant to respond to light?

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(N/A) The hormone synthesized at the shoot tips is $Auxin$.
When a growing plant detects light,$Auxin$ is produced at the shoot tip and helps the cells to grow longer.
When light falls on the plant from one side,$Auxin$ diffuses towards the shady side of the shoot.
This higher concentration of $Auxin$ on the shady side stimulates the cells to grow longer compared to the cells on the illuminated side.
As a result,the shoot bends towards the light,a phenomenon known as phototropism.

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