Question

A plant has a weak stem which can coil around an upright support. It is a
A. Liane
B. Twiner
C. Climber
D. Creeper

Answer 1

Hint: Liane is a herbaceous plant. It is also considered as Woody vine. Twiner is a plant that curls around a support. Examples of twiners are pole beans and morning glories. A climber is a plant that uses support to move to higher heights. They grow in a vertical fashion. Creepers are plants that crawl on the ground horizontally along the ground.

Complete answer:
 Plants with weak stems are usually referred to as climbers or creepers. The basic difference between the two is that climbers grow in a vertical direction while the creepers grow horizontally .i.e., parallel to the ground. The similarity is that they both have weak stems that cannot support the weight of the plant on their own. The thin green stems cannot bear the weight of the entire plant and hence they drag themselves along the support.
Thus, climbers are the ones with weak stems and require upright support to grow. They hold the support along the path of their growth.
Climbers climb on any building, rod, pillars, walls or even some other plants. These serve as a support to the weak stem. The stems tend to grow upright.
Most common examples include: pumpkin, watermelon, money plant and grape vine.
Therefore, the correct answer is Option C.

Note:
Most plants need not be guided. They find their own way to grow and find their own support. They find their way moving towards the sunlight, in an upward direction. Climbers are usually used as ornamental plants and can be planted inside the house as they add to the beauty of it.