Question

The growth of tendril in pea plants is due to
A.Effect of light
B.Effect of gravity
C.Rapid cell divisions in tendrillar cells that are away from the support
D.Rapid cell division in ten dollar cells in contact with the support

Answer 1

Hint: Tendrils are hair-like or very thin thread-like growths of some plants seen on the stems and leaves of the plants called as climbing plants. These plants climb on their nearby structures including other plants, walls and rocks. Pea is one of the plants having tendrils on it.

Complete answer:
Option -A- Effect of light
This option related to the question asked is incorrect as we know pea plants are known to grow in winters more. In winters as days are shorter and the sunlight exposure is less.
Option -B- Effect of gravity
This option is also incorrect as tendrils are seen to grow according to any support as such with any plant or against the wall. So as such, they are not seen to grow with the impact of gravity.
Option -C- Rapid cell divisions in tendrillar cells that are away from the support
As such tendrils need support to grow, whenever tendrils come in contact or touch an object the side which touches grows slowly and the side opposite is seen to grow at a very fast. It causes rapid division of cells on the opposite side. This causes tendril to bend to the side where it touches the object and helps in clinging and does not flow with the wind.
Option -D- Rapid cell division in ten dollar cells in contact with the support
This option is also incorrect as they need cell division to reach and take the support. If support is as such far from the plant they cannot reach so they have to do cellular divisions to reach it and not thereby in contact with the support.

Hence the correct answer is OPTION(C)

Note: Tendrils as such have much importance. It is known to provide support, direction to the plants and by standing erect leaves of the plants they get more sunlight required for the process of photosynthesis in leaves. They allow the weak stem of many climbers plants to climb other plants or any structure to enable their growth.