Question

How is auxin helpful in growth of a tendril around a support?

Answer 1

 Auxin is plant hormone which is synthesized at the tip of the shoot. Ithelps the cell grow longer. When atendril comes in contact with asupport, auxin stimulates fastergrowth of the cells on the opposite side that's why the tendril forms a coilaround the support.

Answer 2

Explanation:

because auxin is a growth hormone and presents at tendril