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Im going to improve the answer from before because its a bit rubbish!

Auxin is a hormone found mainly at the tip of a plant which helps it grow towards the sun for photosynthesis.

When sunlight shines on one side of the plant it will destroy some of the auxin.

The other side of the plant wont be in the sunlight, it will be in the shade, so it will have more auxin.

This means the shaded side of the plant will grow more than the lit side, so the plant will grow towards the light source.

This gives the plant a better chance of survival as it can photosynthesise more.

:D

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13y ago
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9y ago

The auxins are plant hormones. The have the primary role of growth and behavior in the plant's life cycle, and are responsible for plant body development.

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Q: In plants what is the purpose of auxins?
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