What is the result of the uneven growth of the tendril in response to touch?
The tendril circles around the object and clings to it
Tendrils show thigmotropism, a growth movement in response to touch. When a tendril touches a support, the cells on the side in contact grow more slowly than the cells on the opposite side.
Because the far side grows faster, this uneven growth makes the tendril bend and coil around the support, so the tendril circles around the object and clings to it, helping the climber hold on.
The tendril does not grow straight upward, fall off or wither due to touch; those outcomes do not follow from unequal growth.
Hence, The tendril circles around the object and clings to it.
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