Question

How do plants exhibit movement and respond to stimuli?

Answer 1

Coordination is the ability to use different parts of the plant together, smoothly and efficiently. In plants, coordination is due to the result of a chemical system, wherein plant hormones or phytohormones have a major role.

Movement in plants

Plants exhibit two types of movements.

Growth-dependent movements called the Tropic Movements. ( towards or away from a stimulus)
Non-growth dependent movements called the Nastic Movements. ( independent of stimulus)
Tropic movements

These can be classified again into 5 types. They are:

Phototropism (light)
Geotropism (gravity)
Hydrotropism (water )
Chemotropism (chemicals)
Thigmotropism (touch)
Phototropism – It is the movement of plants in response to light. The shoot system of a plant exhibits this characteristic. The shoot moves towards the light.
Geotropism – It is the movement of a plant part towards the soil. This is a characteristic of the root system. The roots always move in the direction of the earth’s gravity.
Hydrotropism– It is the movement of a plant towards the water. The stimulus here is water.
Chemotropism – It is the movement of plants in response to a chemical stimulus. A classic example of this type of movement is the growth of the pollen tube towards the ovule, during fertilization, in a flower.
Thigmotropism – It is a directional movement in plants in response to touch. For e.g. the plant tendrils climb around any support which they touch.

Answer 2

Answer:

One such example is their changing of shapes to capture enough sunlight. When a tree beside another one is tall enough to block the sunlight for the shorter tree, it tries to grow in different shapes so as to get enough sunlight. Similarly, plants in areas with water scarcity extend their roots deep into the soil to get water required for photosynthesis.

Hope it helps...